ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: roadgrime on March 29, 2005, 02:02:14 AM
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ran into an issue this morning driving into work. the little rig (89 sidkick 1.6l) started out running fine but then after leaving a stop sign i noticed it bogging down bad the more throttle i give it. if i accelerate slow it does ok to about half throttle but then will start boging down. if after i get it moving i jam down on the gas the rig will start to slow down. thought what to check how to test etc?
thanks!
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Absolutely the first thing to check is the fuel filter.
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Yep, sounds like the filter
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hmm well it woluld be nice if it was something that simple (cheap) i will take a look tonight (manual is at home)
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Well, if you're at work, most probable issue is water in the gas - so a bottle of HEET may help you get home.
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Hmmmm, I've had this when my alternator broke... Don't know how far you live from work but If you also start experiencing radio stopping and tach falling down like there is no rpm going on. And finally, the motor dies in front of a toll portal, it could be your alternator ;D
But my first guess also is the fuel filter ;)
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sugar in the gas tank or a potato in the exhaust pipe. ;D
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ok well i made it home barely. if i let the rig sit it will start up and go decent for a minute or two. the longer i drive it the worse it is.
i changed the fuel filter this evening and put some heat in it. still no joy.
here is a little more i noticed this evening. if in first gear i get moving and then give it full throttle it will bog down bad and slow drastically as soon as i let off the gas say to half throttle it will pick back up and accelerate. floor it and is dies again.
next? >:(
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check your coil wire,if you have another rig around swap it out.
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clogged cat, check to see if it glows nicely in the dark after running hard, mine did. had two of them go on me actually.
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well i let it sit for about 30 minutes went out started it up and drove it for about 5 minutes and it was bock to bogging down.... so that its un drivable again.
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I had a truck come into my work one time with a kind of similar problem. The cat had melted into a couple big balls of crap internally and when you got onto the throttle hard it would perfectly plug the outlet of the cat, or if you went up hill it would roll back and do the same. It was a V8 with a cat on each bank so it was only killing half the exhaust flow. After awhile I isolated the noise the chunks were making and figured out what it was. It had blown intake gaskets too which didn't help matters much.
Andrew
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Check your fuel pressure, could
be a failing or weak pump, should
be around 36 PSI
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ok well the cat does not glow either i drove it around again this evening after dark until it was bogging down real good and then hopped out... no dice on the glowing cat.
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wild goody doesnt it take a special banjo bolt to check the pressue? can it be bought at the parts store and then hooked to the compression tester? is there another way or location to check the fuel pressure?
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I had to cut the flex line in half and install
a T to hook a pressure tester to it, after all
you do is use a double barb and 2 clamps
to repair the hose, I don't know of any other
way on an 8 Valve TBI engine, 16V could have
a better way
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16 valve you just take the bolt out of the front of the fuel rail and screw in the pressure tester. My tracker had the SAME problem, turned out to be a stuck fuel pressure regulator.
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ok i checked the alternator and coil wires both are good. im going to go down and get some fitting to rig up my pressure guage and see what my readings are.
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When was the last time you checked all plugs were firing? I had a V6 cavalier that wasn't firing on 1 cyl and did something similar.
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Your cat could still be plugged..
Sometimes a way to tell is to bang on the muffler and see if anything rattles within it, like some pieces of the cat that have come out into the muffler..
But how far are you from a muffler shop? Most places will look at your exhaust system for free, to get an estimate.
Here's some steps I found on about.com:
Engine hesitates:
When you step on the gas, the engine seems to bog down or takes a second to respond.
You may notice a general lack of power. You may notice the problem when the engine is hot or cold or when you are low on fuel.
1. You may have a dirty air filter: Replace air filter
2. The spark plugs may be dirty or worn: Clean or replace spark plugs
3. The spark wires may be bad: Replace spark plug wires.
4. There may be some other type of ignition problem: Bad ignition module, distributor pick up. An engine scope is the best way to diagnose an ignition problem.
5. If you have a carburetor, you may have a bad accelerator pump or power circuit: Overhaul or replace carburetor.
6. The fuel filter may be clogged: Replace fuel filter.
7. You may have water in the gasoline: Drain tank and refill with fresh, clean gasoline.
8. Your catalytic converter may be clogged: Replace catalytic converter.
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just to clarify the syptom is that if i step down on the gas and hold it down it doesnt hesitate for a moment it hesitates and then gets slower and slower... so it never picks back up. im gonna drop the cat tonight and pull the plugs wires etc once iget a reading on the fuel pump
Heather nice rig you have there. pretty sure its the one parked in the lot here where i work (you left a note awhile back on my little bedlined beat up junk o matic zuki)
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Yeah, I edited my post..
I was looking at the wrong title.. I got the title right this time.. ;)
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lol ok... looks like i have rules out 1 2 3 6 and 7 5 is invalid are there codes or anything i should look for?
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just to clarify the syptom is that if i step down on the gas and hold it down it doesnt hesitate for a moment it hesitates and then gets slower and slower... so it never picks back up. im gonna drop the cat tonight and pull the plugs wires etc once iget a reading on the fuel pump
Heather nice rig you have there. pretty sure its the one parked in the lot here where i work (you left a note awhile back on my little bedlined beat up junk o matic zuki)
Hey, sweet! I was wondering if I'd hear from you! :)
Yeah, I work in Bldg 4L by post J7. And yeah, it is out front. :) I like the bedliner. We just need to get a lift on it! ;D
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lol nope to to get it running and then a lift/cage ;-)
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Sent you a PM.
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well i just had a similar problem with the samurai, turns out my rear r&p went out as well as a rear bearing it kept getting worse the longer i drove it as well. jack up the front and rear ends and turn the tires by hand making sure if you have open diffs you have someone hold the other side to turn the r&p's, if your having trouble turning them you found your culprit. good luck, 6feetofAIR
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Check and redo your grounds.....these little guys are notorious for having bad grounds cause all kinds of gremlins.....
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ECM also a possibility.....
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well it dont seem to be the grounds and just to be sure i went ahead and went through them. i was gonna replace the pressure regulator until i saw it was 100+ bucks. so i think im gonna rig up a guage right before the regulator and see what i have there and then im gonna hack off the cat...
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can anyone tell me the fuel flow? i was going to try and take a fuel pressure reading at the pressure regulator . i figured that the fuel was coming in from the passenger side into the regulator and then out the regulator on the drivers side into the throttle body. however when i pulled the large hose off the passenger side of the regulator the fuel came out of the regultor some i am assuming its coming in to the regulator on the drivers side in the small hose and the larger fual line is a return line?
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scratch that i figured it out (comes in via the hard line on the firewall side of the throttle body
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had the same problem after doing my swap ended up being a fuel issue replaced the injector and filter runs great now I have the 8v the injector is cake to replace!
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Hmm - nobody has suggested the throttle position sensor yet? ???
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TBI engine only uses the TPS to tell
the computer that the throttle is opened,
or at WOT ect. The trucklet will run without
a TPS, just with a little hesitation, but won't
bog down like the symptoms here.
I drove with my TPS pulled once, just to see
if it was bad or ??? The MAP seems to give
the computer the bulk of it's info, that and the
O2 sensor
Wild
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well what i am thinking now is this... im gonna tap into the o2 sensor and try and get a reading with the volt meter that tells me roughly if i am running rich or lean... the theory is this. if when it starts bogging down it goes super lean that will tell lme that its the fuel delivery system either pump or regulator...or possibly injector... if it goes super rich it will need to be in the exhaust side due to backpressure from the cat manifold etc keeping the cylinders from emptying out and pulling in fresh air...
thoughts?
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You would need an air-fuel ratio
guage to do this accurately.
What is the fuel PSI ? check it yet ?
I don't know if the O2 will tell you if
the cat is bad, I don't think it will show
rich, but a reading of the back pressure
would tell you if the cat is plugged
Wild
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i havent been able to check the fuell pressure since ihavent came up with good way to tap into the fuel. also i dont know how to check the back pressure.
as for reading off the o2. based on how bad the rig is running it should swing more than enough to the lean side (less than .5volts) for me to be able to see it
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>:( , Go check your fuel pressure,
cut the soft line in half with a knife,
put in a barbed T and clamp the hoses,
put on a cheep $4 pressure guage
from the hardware store and check it.
When you are finished use a straight barb
fitting to fix the cut line, I have had this done
for 3 years now, no leaks, like I said, it's only
36 PSI and your symptoms are classic low fuel PSI
You are going to jack around with this for weeks
and the simple thing is usually the fix
Wild
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wild which soft line are you talking about ... back by the fuel filter or up front at the high pressure line right before it goes into the throttle body
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hmm insert curse words here...
well i cut the fuel line right after the fuel filter and then ran a lone though a hole in the floorboard up to the dash with my guage... low and behold today i cant get it to do it....so when i first started the rig up i have 40psi... if after driving it about 20 minutes i can get it to drop to about 22psi but again i cant get it too bog down miss etc. but as i said if i really hammer it i can get the pressure to drop down to just above 20 psi... so what do ya think?
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wild which soft line are you talking about ... back by the fuel filter or up front at the high pressure line right before it goes into the throttle body
I was talking about the one in the front,
but either will do, the pressure drop would
indicate a weak fuel pump or bad/plugged filter,
but since you changed the filter, I don't think that
is it, you did change the filter right ???
I think you should replace the pump, you can
use a bosch external pump, and it will bolt in
the the banjo fittings at the filter if you do it
right, I added a bosch pump when I needed to
boost fuel pressure, I ran both pumps from the
same power feed, you could do the same, and
a used wrecking yard pump would be much less
than the new unit which I hear are about $100
Wild
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I got a similar problem with my 94 tracker.... first gear is fine all the way to the floor, when I hit second, it bogs bigtime when I get on it.... (manual tranny) but when I let off it pics back up again, all other gears are normal, just happens in second, but it clears all up after it warms up for a bit. Im thinkin its the cat cause I hear crap bangin around in there.
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loose cat material will cause many different headaches. rattling around, boggs you down uphill, bogs all the time. I would really check that first. but keep the fuel pressure hooked up, wont hurt a thing, I have one permanently on my motorcycle after I had fuel filter issues.
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yup i changed the fuel filter. when i started all of this . i think im gonna try and drive it around for a day or two and see what shows up on the pressure.
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Sorry to wake this post from the dead, but I am interested in what ended up being the issue. I am having similar problems, happened recently after discovering a fuel leak, I think I fixed the leak, but now I am having hesitation so bad that I have to feather the gas, then get it to rev up to about 4k then slip the clutch to take off, or it will die. I have a new coil, plugs, wires, dist cap, rotor, fuel filter and others. Funny thing is, when I first bought the sammy a couple weeks ago, it did the same thing, but after giving a broad tuneup, went away. Now its back. Im lost, I thought maybe there was air in the gas or something, Im not sure, any help would be appreciated.
Thanks
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Check the keyway on the crankshaft pulley.
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I been searching, lots of threads about how to fix the keyway issue, but I cant find any to show me how to check and see if thats the prob. I looked at the pulley, its tight and wobble free, I started the engine and it rotates straight, no play. Dont know if that means anything. and it was running fine today.
When it was running bad, it started perfectly, you have to give it some gas if it hasnt been started that day and feather the gas for a couple seconds to keep it running(only if it hadnt been started that day), then it idles and stays there. You put your foot on the gas and right when the petal is pushed down it runs into a wall and stumbles, if you feather it a bit, it comes out of it and runs perfectly, revs right up and runs smooth as ever.
If you put your foot in the gas it tries to die, I never let it die, so I dont know if it pulls out of it or not.
It ran like this when I first bought it, I gave it a full tune up and it went away, then I found the fuel leak, I fixed the leak and changed the filter, and its back. Drove it all day today, back to working fine. weird, could I have got some air/dirt in my fuel line that worked its way through, or am I just being optimistic?
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Anyone know? Its running fine now, but I want to check, if its the key I wanna fix it before its toast.
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One way to check the key-way issue without even tearing it down. Get a timing light set up and make sure that the timing stays consistent.
I had the key-way thing happen to me in my 16 valve. When I finally figured out what was going on, the timing jumped around all over the place.
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def alternator check output batteries have memory if they are good and will start and run ya for a whiloe again
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Thats funny, the alternator went out awhile back, I replaced it and its been fine.