ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: loozoo730 on December 27, 2007, 01:04:10 PM
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I have a 90 Suzuki Samurai. It has been sitting for over 4 years. We just replaced the Fuel pump and we know it works because it makes the noise. It turns over and it will fire when we spray starter fluid, but it seems to die within 5 secs. When it does run, it sounds healthy but it will not stay running. We are stuck at this point. Any help would get us back on the trails!
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try replacing your cap, plugs, and plug cables.... also the rotor.... could be a ton of corrosion in there... plugs fouled out, or cables rotted and not getting the spark they need to ignite the fuel. since it is has a lower combustion rate then either. my 2pennies.....
hope this helps. matt
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Surely you cleaned out the old tank and started with fresh fuel?
-Adam
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When I spray in the starting fluid it starts and sounds like it is running pretty healthy. The fuel is new, but the tank is only about an 1/8 full. I will check the spark plugs tomorrow or this weekend. But like I said before, it seems to sound very healthy while running of the starting fluid. It just sounds like the fuel is not making it to the engine. I can hear the pump kick in when the ignition is on.
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Pull the fuel line off of the carb and turn the key on. Make sure you are getting fuel into the carb.
I just replaced a fuel pump then dropped the tank only to find a cracked hose. :P
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If there is a cracked hose, wouldn't there be fuel leaking. I was just looking through my Haynes manual and I totally forgot to check the fuel filter, so that is my project tomorrow. I am going to try bypassing the fuel filter. Can anyone tell me where it is, I have an idea, also how easy is it to get to. I am also going to trace the lines from the tank to the throttle body.
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If there is a cracked hose, wouldn't there be fuel leaking. I was just looking through my Haynes manual and I totally forgot to check the fuel filter, so that is my project tomorrow. I am going to try bypassing the fuel filter. Can anyone tell me where it is, I have an idea, also how easy is it to get to. I am also going to trace the lines from the tank to the throttle body.
Don't bypass the filter even for troubleshooting! Take the fuel line off right up by the throttle body ... wait a minute... Is this a Fuel Injection Samurai or Carb? '90 is FI, right?
-Eric
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I am not sure if the fuel filter is in the same location on the 90's but on my 88 it is mounted to the inside part of the pass. side frame in front of the fuel tank above the rear axle. And I am going to guess that the filter location probably did not change when FI was installed.
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When I spray in the starting fluid it starts and sounds like it is running pretty healthy. The fuel is new, but the tank is only about an 1/8 full. I will check the spark plugs tomorrow or this weekend. But like I said before, it seems to sound very healthy while running of the starting fluid. It just sounds like the fuel is not making it to the engine. I can hear the pump kick in when the ignition is on.
If it's only 1/8 full, who knows what might be mixed with the fuel, maybe water. That wouldn't burn. Otherwise, like others are saying, check to see if their is fuel going to the throttle body. I assume it has it's original f.i. engine unless it was a swap. Does the fuel pump have a blown fuse?
-Adam
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dont know if you got it fixed yet but try pulling the fuel line to the throttle body while the ignition is turned on(should here a humming noise from the fuel pump) if you have fuel there the problem is probably the fuel pressure regulator. locate the regulator and make sure the vacuum line is good and the diaphram inside does not have a hole in it. to test that put a vacuum line on it and suck on it if you just suck your cheeks in its probably good if you get a mouth full of gas its bad. What you are explaining with the fact that it will run on ether means it is not a ignition or compresson problem it has to be fuel.
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Check if the fuel is reaching the injector. Same thing just happened to mine 2 days ago, on my 92' sammy. Fuel pump works and relay, you can hear them kick on. Spray starting fluid down throttle body and it would run. Fuel was reaching injector and injector was not spraying. Pulled t/b harness and hot wired the injector and got it to work. All that lead to one last thing. The ECU or computer was fried on the injector end only, capacitor melt down. Got one from Hawk the following day, solved the problem and was on my merry way.
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I'm having the same problem. I drove my 1987 Samurai to work Friday went to leave it died. It will start for a few seconds then die. I took the fuel line off at the throttle body then cranked the engine plenty of fuel coming from the fuel pump. This is a carb engine not fuel injected. If you can help me e-mail me at kenbyler|removethispart|@hotmail.com I have tried everything runs great if you stand their and keep pouring fuel in the carb.
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If there is a cracked hose, wouldn't there be fuel leaking.
On a Tracker/Sidekick it would because the fuel pump is in the tank. But on a Sammy, or any vehicle with an external fuel tank, if there is a leak in the fuel line the pump cannot create enough of a vacuum to suck the gas up the fuel line as it is easier to suck up air then fuel.
Ridingmystic: Sounds like your carb may be plugged up. I would try a different carb if you can.
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I didn't know if their was a fuel cut out on this carb or if the fuels regulated somehow through a electronic sensor. their are 3 plugins going to the carb i don't know what their for maybe someone can tell me. Thanks for the feedback. :o
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Will the pump pump fuel is the battery is low? I have the line disconnected from the filter and I am trying to see if the pump is pumping. I can hear pump when I put my ear up to the tank I can hear it running
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Will the pump pump fuel is the battery is low? I have the line disconnected from the filter and I am trying to see if the pump is pumping. I can hear pump when I put my ear up to the tank I can hear it running
So you can hear the pump running but there is no fuel coming out of the tank? Time to drop the tank and pull the pump out.
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Check if the fuel is reaching the injector. Same thing just happened to mine 2 days ago, on my 92' sammy. Fuel pump works and relay, you can hear them kick on. Spray starting fluid down throttle body and it would run. Fuel was reaching injector and injector was not spraying. Pulled t/b harness and hot wired the injector and got it to work. All that lead to one last thing. The ECU or computer was fried on the injector end only, capacitor melt down. Got one from Hawk the following day, solved the problem and was on my merry way.
I am having the same (or simular) problem with my '91 FI.
1 How did you hot wire the injector?
2 My Computer was reconditioned by Petroworks about two years ago. Think maybe it died again?
Wayne
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I am having the same (or simular) problem with my '91 FI.
1 How did you hot wire the injector?
2 My Computer was reconditioned by Petroworks about two years ago. Think maybe it died again?
Wayne
To hot wire the injector look for this plug. The red is power and the yellow is the ground, on the far left hand side. Wire direct power to the red for the test, and check results. The ground controls the pulses of the injector which worked for my computer board, but the power to the injector did not.(http://www.fotoshack.us/images/23431DSCF1930.JPG)
I would not think a rebuilt computer would die after 2 years. They rebuild them with better capacitors.
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2 My Computer was reconditioned by Petroworks about two years ago. Think maybe it died again?
Wayne
Its possible, a bad battery or poor connections can take out those caps. I would speak to Petroworks, I think that they offer a lifetime guarantee. It would be worth getting them to test it.
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When you hot wire the injector, I understand you leave the connection connected so the Zuki will run while hot wired. Is that true? Or do I disconnect the plug, turn key on, hot wire and expect fuel to flow?
My manual says to check the ohms reading of the injector, one probe on the red wire and the other on the yellow. Manual says it should be .8 to 1.8, mine is 0.00. If I understand correctly, this says the injector is bad. Any comments on this?
I checked the TPI (?) with the ohms meter, and it is within the manual specs, suggesting the meter is ok.
Weather (and honey do's) permitting, I will continue checking back to the ECU with the meter. I will also try to hot wire the injector.
If you guys think of something else, please post.
Thanks.
Wayne
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I just got off the phone with Petroworks. They said lifetime on the ECU.
I would like to check everything I can, before I send Petroworks the ECU to be checked. Right now, I am suspecting the injector.
Wayne
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My manual says to check the ohms reading of the injector, one probe on the red wire and the other on the yellow. Manual says it should be .8 to 1.8, mine is 0.00. If I understand correctly, this says the injector is bad. Any comments on this?
Wayne
Sounds like a short circuit injector, although it is a very low resistance and difficult to measure- have you got another meter that you can double check it with. I've only had one go short circuit on me when I made a software error and permanently left it on for a couple of seconds. The injectors are expensive so I'd make sure that there isn't something else wrong before replacing it. You can test the injector by just brushing the wires momentarily onto a 12V source, you will hear it click if its good.
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I just tested the injector, with the yellow grounded to the battery, and brushing the red wire, momentarily, to the pos. post. The injector does click.
It is raining and cold out there right now, and I am not working in a garage. I am going back to the manual, till it lightens up a little.
I am still open to suggestions.
Wayne
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Sounds like a bad computer, exactly the same symptoms as my problem. You did the same tests also, except for one. Check on the computer harness side, if the injector is receiving power from the red wire. If not, then it is the computer that is bad.
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I'm having the same problem. I drove my 1987 Samurai to work Friday went to leave it died. It will start for a few seconds then die. I took the fuel line off at the throttle body then cranked the engine plenty of fuel coming from the fuel pump. This is a carb engine not fuel injected. If you can help me e-mail me at kenbyler|removethispart|@hotmail.com I have tried everything runs great if you stand their and keep pouring fuel in the carb.
do you hear any clicking at the carb when it is dieing. if so check all the grounds at the firewall. note above battery. if not its more than likely a bad fuel cut off sylonoid or the carb is sick and needs rebuilt.
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Sounds like a bad computer, exactly the same symptoms as my problem. You did the same tests also, except for one. Check on the computer harness side, if the injector is receiving power from the red wire. If not, then it is the computer that is bad.
Thanks for the tip. I probably will not be able to check this until next weekend.
Wayne