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L20et Overfuling badly :(

stagefumer11
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stagefumer11 Rising Star

stagefumer11

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As above. Its hard to explain what its really doing, i can really on tell my story and what ive tryed and soforth, so see how it goes..

ITs started with comming home after a long day at work..... Spent half a hour got changed and went out. Now i drove the skyline home. and it was running sweet as. Now after hoping back in. No go. it seemed it didnt want to even bite on cranking. It was getting spark and getting fuel. (by the looks of it). After 30mins of waiting. she seem'd to of went. GREAT!

40 mintues later of driving. She started to break down. Missing. Coughing. It started with a bit of a miss/stumble on boost. (6psi atm) backing off the throttle and back on cured it. Then it became progressivly worse. Light throttle Intoduced large amounts of missing. And over the cause of 3km it wouldnt of even idle.

TRying to get up a hill was entertaining.

SO i was sitting on the side of the road in pitch back looking around my engine bay with my little pen with a light on the back of it. And noticed my water temp sensor plug had one of the terminals off, inside the plug hosing. Here's me thinking "Yippie" She will go now. Which i was right. Sort of. Still missed only running on 5 cylinders. This got me able to drop this off at a Friends aunty's place so i can come back for it. and so she was safe.

Next day........... **ding**

Had a look. By the looks on every plug. Overfuling. they were all foued and coated in fuel. Cleening them made no improvement in running. as well not it wont even idle.

Ive replaced. "Water temp sensor", AFM, FPR, dizzy cap. Check fuel pump. and line blockages. Spark is strong and timing is fine. The top of number 5 injector is now leaking, yet again i had only just replaced it.

Its now the point of. no matter what i do the plugs foul. Cleen them, bang foul.

Any idea's ?

Its now at the point of. I replaced the FPR 2 nights ago. And the fuel lines seemed to of primed alot better than the other Fpr did. But now my Fuel pump is pulsating. Its getting a perminant 12v sorce from the battery and is Switched throuh a Relay thats trigured off the car alarm.

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Adam_RSX Proficient

Adam_RSX

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Posted

Sound like what my FJ was doing when I( first got it. Turns out (after much swearing and setting up a compressor to push 10psi into the cooler pipes) that a hose (might have been positive pressure, I guess it couldnt have been vacuum because the engine wasnt running when I found it) under the inlet manifold had come off. It was just in the right spot that you couldnt see it from underneath or above the car and you couldnt really hear where the noise was coming from, but once I put it back on it was fine

blind_elk Grand Master

blind_elk

Posted
Posted

It would definitely have been overfuelling with the broken water temp wire - the ECU would think the engine was cold and it delivers much more fuel to a cold engine.

I suspect the excess fuel has destroyed the plugs. I think new plugs should solve all your problems (but I've been known to be wrong before!).

stagefumer11 Rising Star

stagefumer11

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Well, you guys were thinking along the same lines as me, And i replaced all my leads and plugs, with standard bp5es. Its been running better than before i can now rev to 7k, "not much tho" when i used to run out of spark at 5k. This is only on 6psi 3rd gear has a hell of alot of pull.

Heres a good one, Why does 1st and 2nd have no pull, evenknowing its at 6psi, but 3rd gear just honks compared to 1st and 2nd

V8skylineMAN Grand Master

V8skylineMAN

Posted
Posted

not that im aware of....my NA C210 was doing exactly that, (l24e) and it turned out to be the afm connection....maybe you have a dodge wire in the loom? check that out...there may be no prob with the hardware at all.

stagefumer11 Rising Star

stagefumer11

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ah, if your relating to my Ovefuling problem, luckly thats sorted. I noted when it was doing it, AFM. and repalced that. which was still doing the same thing. But lucky it took me a while but found out all the leads had broken down. wouclnt show any problems without a load on them

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