matwey

I've had quite a time with my car this past year. Here's the next issue: Under light to med. throttle (cold or warm) my car is backfiring like crazy. A 2.5 mile ride = 6+ loud "pops". Also, after warming up my idle drops to just above 600 rpm's adn varies up to 800 rpm's. I know this is within acceptable levels, but for the last 5 years it's been a steady 900 rpm's. This did all happen after installing a used fpd and new 500 cc injectors. My PFS Purple computer is always set at the lowest setting and I have not changed any settings whatsoever. Read my sig for my other mods. Any ideas? Thanks.

DaedelGT

The hunting idle sounds like a vacuum leak. I'm not going to offer anymore because I'n outta my league, sorry.

negative

My FD always makes poping noises. Is that bad or something? I don't know.

Lawyer

Sounds like the problem im having. But my car stalls at start up. rpm goes to 3 and drops to 500 stall. Still have to take it to the shop. Ever think the poping could just be fouled spark plugs?

turbogarrett

iTrader: (1)

500 cc injectors? backfiring probably means you're running a bit rich. change the spark plugs and see if that helps.

matwey

That could be it (richness), will have to take some readings off my keypad. But, my plugs do have under 750 miles on them. But, guess I'll take them out and see what they look like.

matwey

Ok first, I meant 550 cc injectors.... sorry tgarrett
I am getting an 0200 error reading whick is a spark output fault. I did install a used leading coil pack a couple of years ago, maybe it's starting to go???

matwey

Just checked my leading coil pack and I'm reading no resistance......... Trailing was fine so nowI'll order a new coil pack. Anyone who's upgraded theirs have any thoughts?

mcfly4001

hey mateway, any luck with fixing your problem? did the coil pack work?

thanks

matwey

Naw...... no luck yet. Also my idle fluctuates after the car is at norm opperating temp. Forgot to do my plugs though. Might try that tomorrow. I'll post an update by Sunday.

matwey

New leading coil pack installed, no luck. ALSO had a fuel cut or something like that at 5k rpm the other night, totally bogged down. Gonna have to give up and send it to Mallory or something soon.