Missing around 5K
 

My 91 has developed a miss at about 5,000 RPM. I have changed injectors with Accells, new plug wires last fall, new plugs, fuel pressure is in the 40-45 psi range. Secondary's removed with Hailbeck chip. Are my coils going? I think they are original. What else could be causing this problem. TIA

Chris

Re: Missing around 5K
 

I had the same problem. I used a timing light and pointed it at the valve cover to watch the flashing. I moved the timing light conductor from spark plug wire to spark plug wire. I could easily see the miss on two cylinders. This happened to be two cylinders that shared the same coil. Guess what? New coil pack and problem gone!

Re: Missing around 5K
 

Congrats thats awesome!

Re: Missing around 5K
 

:eek:

I got burned by one of my accounts once for $4K (bankruptcy).


(J/k there, CK; hope you get it sorted out there)

Re: Missing around 5K
 

:sign5:

Re: Missing around 5K
 

:cheers:

Re: Missing around 5K
 

Ok, I still have a miss. It comes when I am pushing it hard. Generaly around 5k, but it has come at other RPM's. I have replaced all coils, and plugs. I have a fuel preasue gauge and it never drops below 40 psi. If I stay on it when it stars to miss i get a code 31 (camshaft sensor). Could the camshaft sensor be causing the miss and it only sets a code if I stay on it? Or is the miss causing the sensor to go bonkers because if the erratic RPM's. I am stuck and need some help from 'da brothers'.

Thanks
Chris

Re: Missing around 5K
 

The camshaft sensor can cause these symtoms, replace that first since it triggers the SES light.

Re: Missing around 5K
 

Ya my zr-1 makes me miss about $5000 too

Re: Missing around 5K
 

That part ain't cheep, but I think that is what I am going to need to do. Thanks Z06scentair! I am afraid I might me missing more than $5k when this is all done.:(