new problem need help

[NOKA72]

whats up guys...having a lil problem lately with the buick but what else is new ...here it goes....
start up in the morning and it has a rough idle....back out of the driveway and a very bad bog,miss and tip in stumble on a very light acceleration....get to the corner which is about a 100 feet and all is well...it will idle smooth..iac at 23-25 when she warms up...drive it too work...20 miles and perfect no stumble or miss...shut her down..sit for 15 too 20 minutes and start her up too park in the lot by work and it idles like crap...misses...almost stalls....bucks like a bronco...rev it up a few and all is well..no stumble or stall...but idles a lil bit rougher than i would like..postons 107 cam..i dont think the duration is that large to idle the way she does..i check fuel pressure and heres what i have so far...holds for 20 minutes then falls to zero...i pinch off return line and feed line to isolate injectors and holds fine so i dont think inj are leaking down and i dont think the return side is the problem..i pinch return line and pressure holds...so what do you guys think....sorry for so long and thanks in advance..vinny

 

[HOTSIX]

Vinny - plug wires ?

Just a thought - try the basics...I had a similiar problem - tip in stumble, low power on acceleration, missing on acceleration etc.

Mine was a plug wire that got burnt on headers...was hiding down alongside the headers - and shorting out on acceration.

 

[NOKA72]

hotsix...whats up...i have wires from postons..their magplus wires..i check them out and they look good not burnt...there about 2 years old though...maybe interninally..hmmm thats a thought...but then i think it would miss all the time...gonna have to check again....any other thoughts????anyone...

 

[crazygn]

Tps maybe . spark plugs, coil pack not firing good at low rpm.


I tryed, good luck and let us know.