tp65

Today when i went WOT to about 100mph, the car was kinda breaking up around 4,000-5,200rpm.. what could cause this? i was thinking another vacuum leak..?

P Zero

What do you mean by breaking up??? Misfiring???
-P.

billyam87

the same thing is happening to my car, but im not doing 100+ mph, mine sounds like it could be misfiring or floating a valve. My power also instantly drops off. I have done a tune up, but not checked the timing. the wierd thing is that it happened at 5200rpm, then a few days later at 4100rpm. Im kinda pissed. also, i only have 116K on the engine with everything stock except for the sig.

CrazyCobraSpeed

mayb a fuel filter.... when have u changed it??/ at that high of speed and RPM you pump may have been working is *** off to push fuel thru a dirty filter.... i dont think thats the whole problem tho.... does it do it all the time if you 4000-5200RPMs or just when you goin faster??? also are u an auto or manual??? and breaking up isnt very discreptive... look for better adjectives and adverbs so its ezer to get the point across... really dunno waht u mean by breaking up

91smokedgt

ive worked on a few of those year model mustangs and it was almost all ways the fuel filter. (if you have not changed it).

Kick_Ass2k1

That happened to my car, WOT or around 4krpm sounds like its misfiring or slightly "ticking"... turned out to be the module on the distributor going bad. Luckily I had an extra one laying around that I could swap in. I rem it drove me nuts trying to figure it out, I changed out all the vacuum hoses, tps, even downgraded my 88 back to SD from MAF cause I thought it could be the computer or MAF going bad.

tp65

well, im not sure when the fuel filter has been changed. i only had the car for a month. im going to change that first and see what happens thanks guys.

tbird50ho

id say 9/10 its the pick up coil which is in the distrubutor. happend to me while racing a honda in my 93 GT and he ended up gettin me top end cause it was cuttin out. After that i completely understand what u mean by "breaking up".

LCBlackDep183

btw. I suggest anyone with a sn-95 change that ****ing strator/pickup coil if they get the chance, it causes some havok.

tp65

i knew someone knew what i was talking about, lol. thanks