Sinisterwillys1940
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Everything posted by Sinisterwillys1940
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1990 jeep wrangler with the 2.5l 4cyl engine. it was rebuilt about 10 years ago its got 100,000 ish on the engine. About 4 years ago it started making this noise. Some people thought it was a diesel engine. oil pressure test confirms somethings up. The needle was some what jumpy. It only does it when the engine is warmed up. I suspect its a lifter issue or a spark knock. Any ideas? -
1990 jeep wrangler with the renix 2.5l tbi injection set up. I'm using the snapon mt2500 with 1995 domestic primary cartridge and trouble shooter cart. intermediately I have no reading on the manifold vacuum while the engine is running. I swapped map sensor with one from a cherokee but the same result. could this be a possible ecu issue or wire harness issue?
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It did one rainy night. I put it in gear and let the clutch out the jeep drove its self for a little ways and then it was like letting off the gas and it was fine. Its starting to do this more often now. Ideas?
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Hasn't done it for for a few days it starts so sudden that the belts squeal
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its tricky unplugging that giant connector. The connection looks fine but I got to thinking and I found that the egr I installed has these washers with different size holes. I'm going to try installing one of these washers and see what happens
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I went through the dip stick ground and looked at the engine to fire ground. The dipstick ground I cleaned with some electrical cleaner and sand paper, as for the engine ground the last owner who installed the Napa rebuilt engine mounted the ground wire under the head bolt on the engine. I also looked at the Ecu and I can't figure out how to unplug the connector
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Okay. I'll just replace the engine to fire wall ground wire and clean the oil soaked ground at the dipstick mount. The Ecu is up top of the glove box correct?
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I'll have to clean the grounds. Any on thee spots you recommend I should clean?
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It hasn't done it all week now. I left the lights on one rainy day and the battery died. I got a scanner for it but its currently being fixed. I don't know off the top of my what the pulse and fuel trim etc
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At random times I start my 1990 jeep wrangler tbi. It starts fine but its idle will go up to 3500 and stay there until I shut it off. But I go to restart it and it starts normal
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I adjusted the isa and broke the head off the bolt. Then I got a new one and its adjusted now to spec. The idle is still high but it's running better. It was trying to stall again today while I was driving to get the new Isa
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Single port injection. 1990 2.5 jeep tbi. Thanks again Moses this is very informative. I did get around to adjusting the tps and it seemed to defiantly run smoother and it has great take off. But I'm keeping an eye on weather to see if there's an change. The idle is still high but I haven't adjusted the idle control cilinoid yet. Ill test the map sensor after all the adjustments. Thanks again!!!
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Wouldn't hurt to have the map test info. The jeeps body is in real decent shape and its a newish engine. I should track down one of those factory shop repair Manuals. I appreciate all this help and info!
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Thank you so much! This is some very useful info! Is that book a dealer repair manual?
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I did forget to mention that I replaced the idle control cilinoid this fall. I forgot all about that. The tps was replaced by the last owner and its probably out of adjustment. But the same stalling issue still remains. I was driving it today and it acted up. But the idle is way smoother and it's running cooler... When it's running right. It does seem like weather has a huge effect on it. Thanks for the info Moses it's been very helpful
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Thank you for the info Moses. I'm sorry I didn't reply right away. It didn't change engine idle very much and I went a head and replaced the egr. It's defiantly made a huge improvement in the way it runs. But now it idles high (1300-1500 rpm) and back fires or desils when I shut it down and hesitates once in a while. It hasn't tried stalling yet but I'm keeping my eyes on it. How do I test the map sensor?
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I've got a very stubborn jeep that just won't stay running. I've been fighting it for a year now. And since has improved. But I've been just uses sing and I need a way to solidly diagnose what's going on with it. It has a 2.5l 4cyl Tbi. The issues I'm having is most defiantly effected by the weather and climate and time of day. But the issue seems to mostly fluctuate with time of day. 1. So in the morning at like 5:25am I start it to warm up before I leave for work and it'll start and run just fine till it got to be about 100 degrees then it'll idle down to like 300 rpm and stall ( unless i floor it and hold the gas then it would run fine and do it again. 2. some days it floods so I have to give it gas to get it to start and it'll be fine for the rest of the day. 3. some days (seemingly more humid) it'll start fine or it'll do the first problem mentioned but as I give it gas ( like to go up a hill or some thing) I lose power and then it kicks in again till l let off the gas then give it gas it'll repeat. 4. It kind of goes along with issue 3 it hesitates or "fish biting" effect with acceleration I've replaced fuel pressure regulator, ignition coil and module, spark plugs and wires, distributer cap and roter, timing chain. Last year i did have issues with the injector but since has been fixed. And in the fall the map sensor went bad and almost left me stranded. I did some digging in the Internet and tested the egr and it wont hold vacuum so that's going to be replaced here soon but I don't think that's the issue but it could be playing a part in it
