rotoober

iTrader: (3)

ok, this is starting to drive me nuts tracking down this problem.
Here are my mods: Power Fc (base mod map), large smic, m2 airbox, dp, hiflow cat, cat-back and all the smog stuff still connected - car and motor have 61,000 miles.
Car was running great - stock heat-range plugs - started having a miss which gradually got worse over time. I cleaned the plug wires and it went away. About a week later, it started showing up again, so I figured it was the wires/and or the plugs. I got a new set of magnacores, new stock heat-range plugs installed them both.
Car now had a rough idle and I could hear and see an arc under the uim by the coils. Pulled the throttle body, pushed in the wires and the arc went away, but the idle stayed rough. I drove the car to work the whole next week like this and noticed it had an infrequent miss going down the freeway. At this point I thought there was a vacume leak. So, tried the "old school" method of checking for a vacume leak with starter spray - carefully spray a small portion around the area of the suspected leak, and the rpm's will jump when the engine sucks in the either - works great, except when I sprayed it under the uim it instantly caught fire Blew out the fire - checked it didn't burn long enough to fry anything.
Next weekend, pulled off the throttle body again, checked continuity on the coils - they were within spec. Re-checked the plug wires and found the T1 wire looked like it had a spot on the rubber where the arc had burned a very small spot.
When the car would idle somewhat smoothy @ 1,000 rpm I have 19lbs of vacume. and the vacume/boost gauge never bounces around. Cleaned the ground on the back of the engine, and I also checked the tps through the controller - reading are with in spec. I'm pretty sure this is an electircal issue as I haven't done any overboosting - it's also got a boost controller. On the controller sensor readings i've got NTR, FPD,APR, CCN.
I'm going to clean the air filters this weekend, but after that, I'm at a loss
Help me please! I don't want this bassturd car to beat me! I'm getting ready to take it to the Bay Area to be fixed if I can't figure it out! Either that or threaten it with an LS1

rotoober

iTrader: (3)

Yo! Somebody! Anybody! Drink some more coffee and get yer brain's working!

TwinTurbo_SE7EN

HAHA, that has worked for me several times.

I know this may sound stupid, but make sure the plug wires are on correctly. You know going to the correct plugs. a mix up on even the trailing plugs can cause this. make sure the coil harness is secure and in good condition. If those dont work, I would suggest reading the F section of the FSM. I spent a few hours last night reading it and it has tons of info.

Force13B

iTrader: (19)

Werd to the plug wires. I had a new motor installed and they didn't push the wires on all the way, i'm glad i checked them. I was thinking air filter problem, my sisters bmw started doing that. I did the same thing Wires, pulgs, cap bla bla bla. Still did it tell i threw a new filter in it should have done that first would have saved me like 2hrs worth of work and cleaning.

rotoober

iTrader: (3)

Thanks guy's, back under the thing tomorrow I guess I was looking at the spark plug attachment point for the magnacores when I installed them, looked exactly like the oem wires - seems kinda wimpy!
I wonder if I need to reset the ecu as well?
Also, do either one of you have an ignition amp? Just curious if this would potentially prevent these finicky spark problems..

TwinTurbo_SE7EN

I dont have an ignition amp. I dont have ignition break up either. I would not recommend getting one thinking it will fix your problem. It will most likely make it worse. do you have the stock ecu? if yes, then go ahead and reset it if it threw a code. otherwise, I doubt that it is necessary.

rotoober

iTrader: (3)

Power Fc, was curious about the idle "learning cycle" maybe it is messed up due to the previous poor plug wires...

TwinTurbo_SE7EN

you could try resetting the PFC after you make sure everything else mentioned is in order. to reset, goto etc. -> all data init -> Yes. if you have a tuned map you must have a datalogit to reload the map.

re_rotary7

I would change the wires, if you found a small burn mark chances are that wire is bad.

rotoober

iTrader: (3)

Brand new plug wire that's defective? Never had that happen before. If cleaning the air filters doesn't work, I'll replace the burnt wire with one of the oem one's I still have.

Thanks