ash7
10-16-2007, 12:20 AM
I recently recieved my head back from the machine shop with my new Supertech valves installed with Viton stem seals. Bought a new timing belt, put it on along with a new water pump, front main seal and cam seals.
I'm having the weirdest problem however, when my car is cold (overnight, or bringing it home from work at the end of the day) it runs like a dream. Quick, responsive on the throttle and performs well.
However, after a few minutes of running the engine looses power and bogs down, occasionally stalls itself out. It is responsive at anything over 3200rpm when it gets like this, but gets worse the longer i drive it. Noticing how this issue seems to correspond in relation to the engine temp. I'm assuming it most likely has something to do with the ignition system. (the ECU retards ignition timing as the engine warms up if I"m correct)
- I made 100% sure that the timing is dead on accurate, and the belt has the correct tension on it. And rechecked it while on my way home from work today (pulled over in a gas station, busted out the small tool kit i have in my car and went to town.)
- Distributor is in the EXACT same position it was in when i removed it. (marked the location with a scribe before removal)
- Spark plugs are not fouled out, brand new Densos went in this head as well.
- Correct stock fuel pressure (42-45psi)
CEL puts up a code of 23 (VSS, which has been there for a while. Still working on the S2k cluster conversion)
I'm almost at a loss. I do not have a ignition light handy however, so i cannot verify spark is occuring at exactly cylinder TDC.
Ideas?
-jonathan
I'm having the weirdest problem however, when my car is cold (overnight, or bringing it home from work at the end of the day) it runs like a dream. Quick, responsive on the throttle and performs well.
However, after a few minutes of running the engine looses power and bogs down, occasionally stalls itself out. It is responsive at anything over 3200rpm when it gets like this, but gets worse the longer i drive it. Noticing how this issue seems to correspond in relation to the engine temp. I'm assuming it most likely has something to do with the ignition system. (the ECU retards ignition timing as the engine warms up if I"m correct)
- I made 100% sure that the timing is dead on accurate, and the belt has the correct tension on it. And rechecked it while on my way home from work today (pulled over in a gas station, busted out the small tool kit i have in my car and went to town.)
- Distributor is in the EXACT same position it was in when i removed it. (marked the location with a scribe before removal)
- Spark plugs are not fouled out, brand new Densos went in this head as well.
- Correct stock fuel pressure (42-45psi)
CEL puts up a code of 23 (VSS, which has been there for a while. Still working on the S2k cluster conversion)
I'm almost at a loss. I do not have a ignition light handy however, so i cannot verify spark is occuring at exactly cylinder TDC.
Ideas?
-jonathan