H22UK

Hi, Hoping you guys can help me out......
First of all the basics of my setup as follows

H22 with stock internals
Treadstone turbo kit (turbonetics t3/t4)
RC 550 saturated injectors
AEM EMS.

(have been running this setup for over 6 months)

The problem started a few days ago. I was on my way back home from my tuner after having a GM boost solenoid fitted and had the boost/fuel/ignition trimed etc. Everything was going fine untill the car started to miss fire with boost. It got worse over a few miles and eventually it wouldn't even run so i pulled over and called the breakdown service. Pulled a plug and it had a weak spark. me and breakdown guy guessed it was the ignition coil. Today i fitted a new coil. It struggled to start but when it did it ran fine. Went for test drive and it pulled hard & smooth, didn't miss a beat! Got home and let it cool down for a few minutes. Went to start it again and the same problem occured. It just didn't want to fire up. It seems to fire on 1 or 2 cylinders and the motor judders then just dies, and theres a strong smell of petrol.

So, i pulled the plugs and they where all black sooted up. I burnt the carbon off them (blow torch) and re-fitted them. Got the car started went for long test drive came home and still it would take a minute or 2 to get it re started. It deposits lots of soot on the drive way and my rear bumper when i try to start it.....

I'm thinking either,

It could be a relay, or maybe crank position sensor, or maybe the ignition module?



Any ideas.....?

conjur

Do you have the AEM EMS set to +25% enrichment fuel when cranking? Also, what injector size are you running? if it is too big (550cc+), you will have to LOWER the enrichment fuel while cranking a bit.

Sounds more like a tuning issue, either poor low-rpm fuel/ignition maps, or too high of a setting for enrichment fuel while cranking.

V/r,
Mike

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1999 Prelude - Base Model, 99 Yukon SLT 4x4 -- Stuffs For Sale
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H22UK

Thanks for replying..

Although i did mess around with the enrichment wich didn't improve things, I don't think its down to the tuning. The car has always started fine with my tune and it started fine when i left the tuner before it broke down. It would be a bit of a coinceidence that i replace the coil and it cures the actual running problem if it was down to the tuning......