ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: SafetyGuy on October 27, 2008, 07:38:37 PM
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I have a 1991 Samurai (EFI 1.3L) that I have been chasing a major dead spot in the throttle for about two months now and still have not determined why it is there.
This morning I was driving to work when the engine shut down like I had shut the key off. I had plenty of battery, lights, radio, heater, everything worked except for the engine running.
I walked back to the house (about a mile) and got my truck and continued to work.
After work I had my wife pull me back to the house where I was able to get it in the garage. If I pour fuel into the throttle body, it will fire off and run for a few seconds before running out of gas.
When I turn the key on I can hear the fuel pump come on and shut off after a few seconds.
I have felt that my throttle dead spot has always been the Throttle Position Sensor.
Here are some questions:
1. Could the TPS have died completely and be causing this problem?
2. Could the computer have died and cause it to run only when I pour fuel in the intake?
3. Could it be a faulty injector?
4. Could it be the fuel pump?
5. Where do I go from here?
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ok i guess first question would be is there gas in the truck? ???
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Yes it has gas in it.
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when was the last time the fuel filter was replaced?
do have anything to check fuel pressure with?
the fuel pump could be running but might be clogged or not enough pressure
Ive never worked on a 1.3l efi ( ive got a carb hehe) so not to sure what the truck is equipped with but suzukiinfo.com has some downloads for the efi 1.3l for you could look at it might help.
in my experience ive only had a few tps with dead spots usually the just go. but its a possibility ???
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This is a list of things I have done to it in the last two months,
1. Spark plugs
2. Plug wires
3. Cap & rotor
4. Fuel filter
5. Checked fuel tank for debris
6. Checked fuel pressure (27-28 lbs)
7. Checked timing (10')
8. Checked for loose grounds (found one and repaired)
9. Added fuel dryer twice
10. Checked for vacuum leaks (none)
11. Had TPS checked (OK)
12. Repaired exhaust leak (thought it might be effecting the 02 sensor)
13. Replaced 02 sensor
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are the injectors in the throttle body or is it a fuel rail system maybe u can see if the injectors are working if not might be something elec?
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computer
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ECU...ours was DOA as well about a month ago. SPARK at plugs, fuel in line...run with gas poured in throttle body.
guy on zuwharrie.com does them or there is someone on ebay as well...
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I agree with the dead computer issue. The circuit that deals with the injector gets corroded because of a capacitor that leaks and ruins the trace. I've replaced 2 computers on injected Samurais because of that problem and more than a dozen on Trackicks.
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ecu is dead you can rebuild it
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I believe petroworks does rebuilds on them
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OK,
A couple more questions.
If the ECU is dead, could it have been malfunctioning and causing the dead spot in the throttle and 1badzuk2 said,ecu is dead you can rebuild it. I can or I can have it rebuilt?
Also,
Someone asked if it had a fuel rail or if the injector is in the throttlebody. It is in the throttlebody.
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i asked if its in the throttle body
i was going to say could u see if it was squarting? if not it could just be wiring or injectors. both easy to check
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you can its not that hard heres a link http://www.izook.com/tech/samurai/engine/pwecu/pwecu.htm its the ecu
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SNJSamurai,
Yes it is a throttlebody. I need to determine if it is a bad injector or the ECU not sending a signal to the injector telling it to open.
1badzuk2,
I will checkout the Link. Thank you
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everyone keeps saying its an ecu. these guys know there stuff. but it never hurts to make sure its not just an injector or a cut in the wiring. did u find any info on how to check the injectors
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Been there done this many times. The dead spot is caused by a malfunctioning ECU due to corrosion and at least one bad capacitor. Yes it is throttle body injection. Replace the ECU and all will be right with your "Zukiworld" again. 8)
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yes thank you or like i said it can be rebiult if your not sure i can do it for you for a little bit and you buy the parts or i can buy the parts and do it. i have a 91 efi sammy not sure if the ecu is still in it illgo look and let u know
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I have the ECU out and pulled the cover off it. I am far from being a electronics expert or even know much about electronics, but it appears to me that resistors (I think that is what they are called) number C60, C106, and C112 are all leaking a black substance.
1badzuk2,
If you still have your ECU, please let me know.
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im so glad i have a carb lol
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you know the carb ECU can do the same thing
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really how? what does it control?
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You can also use a fuse in the empty space in fuse box and the zuke will throw a flashing code via check engine light...
http://www.izook.com/tech/samurai/basics/basicdiagnostics/enginelight.htm
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I didn't see it suggested but on my 1.6 8v sidekick efi throttle body engine I was backing up and then it died out of nowhere. After thinking the worst I found it was a fuse on the standard fuse block that handled the fuel injection. I am not sure if the efi sammys have the same fuse but it would only take you a minute to look at all your fuses and make sure you have no blown ones.
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I found a injection system with the ECU for a 1.6L for sale for $150.00. Will this ECU work on a 1.3L engine?
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no but i did find that i have a 1.3 efi ecu from a 91 sammy id be intersted in a trade ill even give you a few bucks or is it on ebay if so ill still hook you up with the ecu cheap
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The ECU I found comes with the entire intake and wire harness. It is off a 1991 Tracker 1.6L EFI.
If the ECU will not work on my 1991 Samurai 1.3L EFI, can I put the entire 1.6L intake, harness, and ECU onto my 1.3L?
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You would be better off just finding the correct ECU for your Sami.
If you swapped the intake, throttle body, and ECU from the Trackick you would also need the distributor and housing. Not worth the hassle. And of course you have to redo the other harness.
And no, you can't use the Trackick ECU. Totally different beast.
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no you cant use that on your 1.3 you will need a 1.6 motor i have the ecu you need do you want to trade or can i buy the 1.6 intake and ecu and wire harness.?
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1badzuk2,
Yes, Please e-mail me at blessed_24_7|removethispart|@msn.com
Thank You
Paul