So my CEL came on again today. I almost just wrecked my car just so I can get my money back for it. Jesus christ I have gone through so much shit trying to get this figured out.

It's a minor misfire, I think it's around 90 small misfires every 30k cycles (around that from what the diagnosis showed)

Here's what has been done:
Leakdown, compression test

Leakdown - Fuel pump was bad - replaced fuel pump - warranty

Compression test - Valves were bad - Replaced Entire cylinder head and valves, springs, etc. - warranty



So I'm thinking, what the F*&#*&@#&$ could it be? The pistons and cylinders are in perfect condition.

I was thinking of getting the injectors all replaced, but before I was do that, I wonder if it is the MAP sensor? I had for a while, symptoms that I think are associated with a loose zip tie, sometimes on a cold start the engine would randomly lose its rev like going from 3 to 6k it would all of a sudden like choke as if I let off the gas, but not drastically as if locking up.

They said they checked the spray pattern of the injectors and it was fine. Any ides? I'm stumped . I'm bringing it in this weekend and they are going to take another look at it.....How could the previous owner have been such an asshole to this car? < Rhetorical question. But honestly, why buy a performance car if you're not going to take care of it? WTF.

Any ideas would be awesome.....

- Matt

 

my buddy have the same problem before he change out the coil and fuel injectors and then a valve adjustment and now he's fine.

 

hmmmm......so even if they did a spray pattern check of all the injectors and they are fine I should still replace them?

 

you can find injectors and coil for a very good price its probly cheaper just get them off for sale section. just my 2 cents

 

Are these misfires on one, two, three or all cylinders?

 

I am having the same problem as we speak.

 

I just picked my '01 w/59k from the Honda dealership, and they assured me they performed the whole diagnosis check. They came to believe that the car has bad gas, which makes sense... cuz up until two days ago, i'd never had this problem and only filled up at Chevron's. I F'd up and filled up at the Sam's club (really cheap), and threw the CEL for all 4 cylinders misfireing, about 20-30 miles after the fill up. The dealership threw in a can of BG or whatever that additive is, and told me to waste the last of the 1/2 tank of gas. I'll keep you posted.

I have read probabley every post about misfires, and can tell you your problem is either:
-injectors
-fuel pressure regulator
-coil packs
-spark plugs
-ECU malfunction (more common than u would think)
good luck, hope this helps!

 

The specific DTC would be a good place to start.

 

To the OP....why are you banging your head and pulling your hair out? Pull the code and it will tell you what is wrong and which sensor is give you the CEL.