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Yes that is what's happening, but it also happens when I'm for instance just sitting straight as an arrow at a stop light the idle is up and down even then.

I have an 88 Chevy pickup. It originally started as a low idle when turning sharp either directing (and sometimes dieing) and evolved into the idle fluctuating up and down when you are straight. I...

Also the aftermarket exhaust is a cheapy... I put it on when I was 16 and just never replaced it to stock. Now that it's been on there 5 years it's getting really irritating... I just want to make...

Oh and it's not carberated its fuel injected.

I just had timing and coil problems. In the midst of fixing that I replaced the ICM, Coil, Spark Plugs, Plug wires, filters, engine retimed, They rechecked the timing when I went in this last time...

I have a 92 Honda Civic DX. I took it to Honda recently because it sounds like it's backfiring. They told me that it in fact was not backfiring, but it has an aftermarket muffler and that this was...

I have an 88' Chevy 1500 truck. Lately it has idled low and kind of rough/noisy. It stalls whenever you turn the truck sharp either direction. Any ideas? It almost sounds to me like it is getting...

k... I have a really bad coolant leak. I took it to this radiator guy today (only cause he was the only guy open) and he has told me in the past I have a bad head gasket when it was just a leaking...

Is there anything else that could cause timing to change?

Hey... back again. :( My car has been running great all week, but today I was in town doing errands when I was sitting in a parking lot (the car was idling) it kind of started to do that backfire...

I can't even remember the last time the car ran this good. More power, the pinging noise that was getting really loud is now virtually unnoticable, the exhaust makes a lot less disgusting noises, it...

Okay so here's my next question. The last person to replace the distributor was 2 years ago. So how come the coil that was in it lasted 2 years on bad timing, and following replacement the coils...

Oh just curious on another thing... How does the timing get that far off?

Thanks so much for your help. I learned a valuable lesson about just biting the bullet and paying a little extra for genuine parts and dealership service. Thanks.

Okay just got the car back from Honda. I put in the Genuine Honda coil, and took it there this morning. They said the timing was retarded fifteen degrees and the distributor is already in the advance...

I set up an appointment at Honda today. But I talked to my brother (who has many years experience at a honda dealer) and he had talked to the mechanics at his honda dealership and they seem...

Okay I will perform the K Test is there any chance the wire going from the ICM to the Coil could be bad. Because with the key on (but car not running) I get no battery voltage from that wire when it...

So after that information do you still think it's the ICM or no?

I'm looking up an new ICM on Rock Auto.com and there's 2 listings "Control Module" and "Ignitor". The honda part is under "Ignitor". Which one am I supposed to go to? Also if I have a "Tec"...

Also could it be the distributor its self, or the ECU causing these problems? Or no?

Thanks. I took the ICM back to Autozone because they said they would exchange it and they said that it is good so they wouldn't give me a new one. But what you're saying is that it's a compatibility...

It's dark here now so I'm going to put everything on hold until tomorrow. What function does the blu wire have? Could a bad ICM be frying coils? I just went out and ran the car. It starts fine and...

I have 12.55 volts to the blk/ylw wire. That means it's getting the right amount of pwr right?

Thanks I don't have a tachometer, but I will give the other test a shot today. I will let you know how that goes. The car still runs and starts as of now, but it's definitely on its way out like I...

Okay day 2 and the car sounds really bad, it's cutting out again. I think the coils on it's way out again which would put me at # 4. I'm completely lost. The mechanics just keep telling me "I dont...

I got it back and it drives fine as of now, I will keep you posted though. The coil before the last one lasted a week...

Is there a fuse that limits the voltage going into the coil?

I talked to the mechanic and told him to actually ohms test the spark plug wires and he wouldn't because he says that as long as it's firing they are fine. I've been told it doesn't matter if they...

The mechanic said the plugs and wires are good... any other ideas?

The mechanic just called me back and told me that the wires from the distributor are all fine, but I do not believe that I have had 2 coils that were bad from the start. Something is frying the coils...

Okay I went to pick it up from the mechanic and it purred like a kitten... then when I went to drive away it surged harder than it ever has and burnt up the third coil. The mechanic says this may be...

I took it back to the mechanic and it turns out my PCV valve was stuck and somehow my idle adjustment was way off. Thanks for the help.

Well I went back to Shucks where I originally got the part... and they exchanged the coil for a new one. I put it in today and the car fired right up. I double checked on the spark plug wires (this...

Yes that is what I am saying. Looks like something that I overlooked caused the problem. One of the spark plug wires was not connected firmly, and I drove it about 300 miles that way on a trip. I...

I did just replace the plugs and wires , cap & rotor... so do you think it was the spark plug wire not being in there all the way... like I said there was black soot on the metal connector on the...

Oh and when I took the cap off there was a white talcy powder in there. The ICM looks good, but it looked good last time it failed ( it was replaced with the coil about a week and a half ago). I know...

I just took out the (brand new) coil and from my readings it is bad. Could the previous mistake I mentioned cause this? Or is there something deeper... I really want to know before I stick another 80...

I found a mistake I have made on a previous repair... one of the spark plug wires was apprently not correctly plugged into the cap. It looks like there's been really bad arching there because the cap...

I looked at Rock Auto.com the prices were great... but I'm moving in 2 weeks and need the part quicker. They charged like 25.00 for 3 day. Also I was wondering if a sensor was bad would the CEL be on?

When you are talking about the main relay you are talking about the PGM-FI Main relay correct? The part number you gave me for RockAuto went to Fuel Injection Pump Relay?

If there was a bad sensor, wouldn't the ECU be sending a signal for my CEL to come on? I was just trying to make sure that it wasn't a sensor.

Im just concerned that this is a never ending money pit. I really wanted to narrow it down to something I could know for sure before I throw more money at it. (as I'm moving in 2 weeks and am in no...

All right. I just went and put the main relay back on and it still doesn't start. I am getting all three clicks though, that doesn't rule it out though right?

Okay so I ended up taking the main relay out. When I went to do so, I just barely wiggled the relay (before taking it out) and then the car wouldn't even start after I did this. And this is like 10...

I just went out and started the car. Its been sitting 3 hrs. It started fine, then shut off. I started it back up, and it almost died, then picked back up before it died. This is new it hasn't done...

Okay well, the coil and ICM are brand new, cap & rotor are good. I don't know about the ECM, distributor housing, or the main relay. I noticed the main relays are fairly decent priced, so I may go...

What do you mean by "known-good baseline"?

Is there any way to test for a bad ECM? And if it was a sensor in the distributor wouldn't I have a CEL?

Is there any way to test the main relay?

The car runs better when it's warm than when it's cold. When it's cold it just wants to keep shutting off after I start it. When it's warm it barely does it.