Ok, so my car needs to be 100% done minus the exhaust work and then in for a safety by tomorrow. The car doesnt bloody start.. It sounds like it wants to run on 3 cylinders when I try and start her but after about 10 secs of cranking, I can let off the ignition and she'll start but automatically go to 2500 rpm and sit there until i turn her off. Also, its kinda funny cause when I say it sounds like its trying to start on 3 cylinders, I have sparks in all 4 cylinders, also it doesnt constantly sound like its trying to run on 3, but sometimes 4. I know I set my timing right but im going to inspect it again. I swapped coil packs (with dead ones) and it got worse. I swapped the CAS with one I picked up from the junkyard the other day and I never got a spark or any detonation from any coil packs.
Can anyone shed some light on this for me please?
Note: the CAS is in the default position when I crank it over
NEED A QUICK REPLY! Timing or high rev??
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AmoebAssassin
- Posts: 2424
- Joined: Wed Nov 17, 2004 7:11 am
- Car: 1991 Base fastback 5spd, black
Check the TPS and throttle body for correct voltages and positions ant 0% throttle and 100% throttle? Also check that your idle air valve is functioning properly. I'd say compression is going because of the whole start on 3 cyl that you're talking about, but that wouldnt cause a low/jerky idle, not a high idle.
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boost_boy
- Posts: 7051
- Joined: Thu Nov 14, 2002 7:28 am
- Car: B12 sentra w/built CA18DET, B12 sentra w/fully-built CA18DET, S13 coupe w/ CA18DET, S13 hatch w/CA18DET, 2002 maxima SE
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Re: NEED A QUICK REPLY! Timing or high rev?? (DjLiquid)
Your 3 cylinder issue could very be a bad ignitor or ignitor harness plug. If your engine compression is good in all cylinders and spark plugs are not wet, then assume your issue is around your intake manifold. Your throttle plate stop arm's adjusting screw can very well be too high. It is the arm that stops your throttle cable carriage arm from hitting the manifold and completely shutting idle air off (you'll need an 8mm wrench for this one). Another point of interest that no one knows much about or has ever mentioned is the seal that seperates the two butterfly sections on your intake manifold. Although rare, these things do go bad and cause a massive leak that you will never be able to find. If you look down behind your intake side valve cover and in the middle of the butterfly housings, you'll see a lever with an adjusting screw on it. On each side of this part is seals that can easily be blown out by a violent intake backfire. hope this info helps.........DjLiquid wrote:Ok, so my car needs to be 100% done minus the exhaust work and then in for a safety by tomorrow. The car doesnt bloody start.. It sounds like it wants to run on 3 cylinders when I try and start her but after about 10 secs of cranking, I can let off the ignition and she'll start but automatically go to 2500 rpm and sit there until i turn her off. Also, its kinda funny cause when I say it sounds like its trying to start on 3 cylinders, I have sparks in all 4 cylinders, also it doesnt constantly sound like its trying to run on 3, but sometimes 4. I know I set my timing right but im going to inspect it again. I swapped coil packs (with dead ones) and it got worse. I swapped the CAS with one I picked up from the junkyard the other day and I never got a spark or any detonation from any coil packs.
Can anyone shed some light on this for me please?
Note: the CAS is in the default position when I crank it over
Dee
Re: (r34 gtr)
Im also using a few vaccum linesr34 gtr wrote:thats why my engine only uses 3 of them!
- tim
1 FPR1 Butterfly actuator1 Turbo actuator1 Brake booster
That is all. I just never plugged a line and it screwed me over