fordguy17

yeah, like the title says. my car hesitates on acceleration (but not always) and drinving down the road it pops/backfires whether holding a steady rpm, accelerating, or decerlating. every time it does so the tack jumps around and then goes back to where it was. this happens over the entire rpm range.

it does this in intervals of seconds with no pattern that i can figure out.

since the tach jumps around everytime this happens i would guess its something electrial, but i have no clue where to look.

help please its almost undrivable

Ninety5five0

Have you checked your timing ? Did you do any tune up work lately ? This just start happening out of nowhere ?

fordguy17

it happened about two times coming home from the gym and then the next time i drove it it started doing it more frequently, so pretty much out of nowhere.

a tune up was done a few thousand miles ago: new plugs, cap/rotor, fuel filter.

oil change was done like 200 miles ago.

i thought i might have too much timing, i have to run 93 to keep from pinging (i set it like that on purpose) so i pulled the spout plug but it made no difference.

the timing has been set like that for months and months though...

the plug wires are kinda old (almost two years) and they are ford racing 9mm. should i go ahead and replace those?

Wisconsin 5.0

Sounds like either a distributor problem or carburetion. I had one acting like this years ago...I jumped in a put in a timing chain...it was the carburator.
[/align]

fordguy17

well, i'm fuel injected...

musclemustang94

I am having the same problem after 4000 RPM, i am fearing that its a timing chain because I dont wanna take it apart untill I am ready to puta new cam in it...I am going to intstall a new fuel filter soon. I was going to do it yesterday but the 500 was on. It will buck and jerk and hesitate sometimes but when i rev her up to 4000 she starts popping and backfiring and i lose power. Sometimes it even pings.

mattdel

if the tach is jumping around at the exact same time that this problem occurs, you need a coil. no ifs, ands, or buts.

HACKGT350

it deff sounds like you messed up your firing order thats what mine did when i messed it up had two wires switched around at idle it sounded like it had a monster cam then when i would start driving bam bam bam bam bam out the exhuast with hesitation

95walter

not trying to steal this, but my car is soing the samething and i wnet to autozone to get it scanned and they said it was the maf that was going bad

Swirl

I hope that isn't what is what's wrong with mine.

I have the same issue as the OP, I plan to get new wires and plugs soon.

Swirl