ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: fordguy79 on June 08, 2010, 07:33:44 AM
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It all started after i changed the o2 senser not sometimes then i drive i will shift and get back in gas it seams to bog down i push harder and its like it clears up could my TPS be acting up?
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TPS, dirty MAF, low fuel pressure/plugged filter, plugged CAT, dirty air filter
and perhaps a slipped timing belt could all be contributing to this problem.
Start with the easy stuff, like the air filter and work through it
Wild
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Don't maen to hi-jack but mine is doing the same thing it is missing too. It gets worse when I advance the timing and when I'm at light throttle cruise it is most noticeable
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that sounds like plugs or wires or both, also check
the gap on the plugs
Wild
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new timing belt no cat run fine till i changed the o2 senser
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My 02 censor isn't very old! I checked the tps,coil,igniter,iat,plug wires and plugs have 2k miles on them and the fuel pump has about 4k miles. I went out to start it one day and it was running cruddy. I went 30mi. One way and the further I went the worse it seemed to run. Same thing coming home!
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new timing belt no cat run fine till i changed the o2 senser
Well for peat sake, put the old one back in !!
Wild
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replaced do to a wire broke off. it runs great when I first start it and drive. if I stop some where and turn it off when i start it again is when it happens it bogs under load on the bottom half of the pedal. it will go away in 15-20 minutes if driving. I wonder if its loading up that's what it feels like
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You might of got a bad one, I got a bad Bosch O2 sensor once,
and I really didn't think that would happen.
Your O2 is a 3 wire one and heated, a non heated one will work also, you
just need to connect the right wire, you might check the replacement for
the correct readings, if I remember right, the pins are diagonal from each other
these are the heater pins, the sensor to computer feed is the one by it's self
in the corner, with an ohm meter check the heater pins for continuity, if they
don't give you a value or are open circuit replace the O2.
Also check for voltage at the plug on the truck, if this is dead, the heater won't
heat the sensor and it would act like what you described
Wild
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I changed plugs,wires, O2,changed out the tps with one I had. The coil is reading 1.0 primary and 12.99 secondary. According to my haines manual it is way out of spec! My book says it should be 22-30k ohms. How are you guys with the 16 valves checking you fuel pressure with the banjo fitting and no valve stem on the rail. Are guys putting fuel pressure gauges at the end of the fuel rail? Thanks guys!!! I'm thinking it is the coil or TRE fuel pump. It is a little intermittant but misses every where.
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I wanted to add something I thought was odd. When I tested the coil secondary resistance it was coil positive to the coil post that goes to the dist. Cap. I then tested the negative to the dist. Cap tower and it also read the same...12.99ohms. Thanks,
KJ
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I went and checked fuel pressure and it is in spec! I think I have a computer problem. It is cutting out when i hold it at part throttle in the driveway so I hooked up a volt meter to the injectors. when it cuts out it is just like someone turned the key off and back on while holding the throttle steady. any help would appreciated.
Kevin
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check your grounds, the injectors get grounded to fire, if the ECU has
a bad ground it could do that
Wild
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Thank you, will check it out.
kevin
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There is a bundle of ground wires on the 8V engine on a bolt
or nut where the distributor is, I think it will still be there on the
16V engine, start there, and make sure they are all connected
and are clean and no corrosion on the connectors
Wild
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relays are supposed to take the high loads, but not get too hot,
sounds like a high load on the relays
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It does have a high output fuel pump, the same one my brother has on his 96 tracker. Mine has been on quite awhile! Thanks
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I measured resistance on the relay and it is suppose to be zero per the haines manual and mine is showing 11ohms. sound reasonable? I put the fuel regulator off of my old engine on today and it didn't change anything. the cutting in and out seems to only happen when it is getting warmed up. Not doing it when cold.
Thank you very much for all of your help! Great site and people here!
thanks,
Kevin
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I wonder if the relay getting hot is causing a drop in pressure or something???
Try replacing the fuel pump relay with a wire paperclip, and see if the bogging
is still there, you do this by pulling the relay and check the diagram, I think it's
pin 85 and 87 that is the pump power feed
Wild
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i back probed the relay wires and there was no drop in voltage i held the rpms at 1900 and it was doing the cut out deal and no viltage drop was witnessed. I'm going nuts here. have you any experience with checking the igniter or have you come across a bad one?
thank you,
Kevin
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I unplugged the tps and it runs way better. i adlusted it to the specs in the haines book but it must be wrong so i will look it over! it seems i did this before i put my other (spare) tps in it and it ran better then! if it is adjusted right would this lean toward a bad computer!
thanks,
Kevin
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I don't think the EFI computers go "bad" they just quit,
the term GIGO is what comes to mind, garbage in, garbage out.
A bad sensor or other input is the most common problem with
EFI systems, or some other hardware such as pump, filter or
injectors that cause bad running
Rhino should be able to give you a more exact answer to the
computer being bad
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i think i got mine fixed traced the wires on the o2 senser the used two wires the same color so i swapped them been 3 days no boging hope you get yours soon thanks for all the help
jon
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I agree but what is the darn GI. I really think it is an injector or maybe the igniter but odds say it isn't. My brother has a fuel pump that I'm really thinking o throwing it in! To month it really acts electrical! Thanks for the help and I'm glad fordguy got his going!
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Wildgoody, your right! Computer is good! I'm thinking injector!
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mine started to act up again but worse did some tests every thing was good unpluged o2 senser all better will try a new o2 senser and see what happens
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Fordguy, I wonder if your having a ground issue?
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Fordguy, did you get yours straightened out? I haven't!
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ya i did the wiring on the o2 sense where way off i had some time testing things. It's been 2 weeks and running strong but rich mpg suck!!!!!!!!!
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Oh, good to hear it was fairly minor! I think my injectors are bad. I back probed the o2 and it is all over the place, .18-.83 at idle and operating temp.