Stummbling under 2k, Fine if i give it gas quickly

M

miller92063

Member

Oct 12, 2005

253

0

16

Nebraska

Apr 15, 2007

#1

• Apr 15, 2007

• #1

Car is finally running and charging. thank god!
But now, after the car warmed up, when I give it gas it just kind of stumbles, and bucks a little.
Then when I got closer to home I realized that if i hit the gas harder it won't do it.
I really don't want to hit the gas hard before the heads and cam have a chance to get broken in.
Any thoughts?

Where should my F/P be set at, since that could be it?

 

M

miller92063

Member

Oct 12, 2005

253

0

16

Nebraska

Apr 15, 2007

#2

• Apr 15, 2007

• #2

nevermind on the F/P, i just remembered that with my new chip i can not change it.

 

AznStanger3v

Active Member

Aug 11, 2003

2,026

0

47

Northern VA

Apr 15, 2007

#3

• Apr 15, 2007

• #3

sounds like a misfire.

or

vacuum leak

but

my best guess is a misfire

 

JJ95GTID

Active Member

Sep 22, 2003

1,141

4

49

Phoenix, AZ

Apr 15, 2007

#4

• Apr 15, 2007

• #4

My car bucked under 2k rpm but ran fine in the upper rpms when the MAF sensor went bad. I cleaned the wires and must of broke one. Replaced it and all was well again.

 

M

miller92063

Member

Oct 12, 2005

253

0

16

Nebraska

Apr 15, 2007

#5

• Apr 15, 2007

• #5

I've got a brand new MAF and an MSD ignition.

I think it may be something with the fuel injectors, bought them used and I think one may be sticking open, but would that lead to stumbling at low rpm?

 

AznStanger3v

Active Member

Aug 11, 2003

2,026

0

47

Northern VA

Apr 15, 2007

#6

• Apr 15, 2007

• #6

possibly if it was actually flooding the engine out. but that wouldnt explain why when you mat it, that it runs like ass. pull plugs and look at them. they will tell you novels

 

M

miller92063

Member

Oct 12, 2005

253

0

16

Nebraska

Apr 16, 2007

#7

• Apr 16, 2007

• #7

the plugs are brand new, like 2 miles on them, I don't know if they've wriiten any novels yet.
I believe I used bosch triple platinum, they have a funny tip, I did not check the gap. Not even sure that they could be changed

 

Killercanary

The car that set the bar.

Founding Member

Nov 29, 1999

5,676

1

76

Altoona, PA

Apr 16, 2007

#8

• Apr 16, 2007

• #8

What cam is it? Are you sure its just not the typical low RPM buck associated with agressive cams?

 

1TallMF

New Member

Apr 17, 2006

955

1

0

Montreal

Apr 16, 2007

#9

• Apr 16, 2007

• #9

Our cars HATE platinum plugs. That could be your problem right there. Sounds like similar symptoms that I've heard from other guys who've run Platinum plugs. Try swaping them out for autolites or motocrafts just to see if it helps.