TrimDrip

I would just make sure it isn't out of fuel is the reason it is cutting out.

Other things I would think is: the maf is maxed out, spark is blowing out, or maybe ignition. Could be a coil too I guess.

mjr46

at what rpm does it cut out??? what are the plugs gapped at??

89 mustang

TrimDrip~ i think ur right with the MAF im runing the same maf. i was looking in to a draw trough one or blow by but im not sure witch one to get or what brand?
the plugs r new and i changed them out once it started cutting out for the first time. the gap is at .030 when i firts built my stroker i ran it with the 19lb and stock maf sensor and to me it acts the same it would cut out if i was to punch it, right around 4000-5000rpms but if i was to feed it it would keep on going.
With the S/C set up it will do it around the same rpm also. so my problem was i was maxing out my MAF. i will order a new maf i just need some healp on witch one to go with!

89 mustang

to day i got to mess with the car a bit.
1. I leand it out by instaling a sample tube calibrated for 36lb injectors and bumped my fuel up to 50psi. it dident feel that strong though but it still would cut out but not as bad as b for. i also was waching my fuel and it never did move up or down when it cut out it stayed right at 58 59 psi! i can see my fuel psi cuz i have the gage mounted up behind the hood and also my a/f was up in the rich so that tells me it isent fuel cut right??

TrimDrip

well, this is getting a bit out of my league as far as tuning. The computer does adapt to fuel pressure by shortening the pulse of the injectors. So if it was good and got worse, I wouldn't totally rule it out. One way to tell if it is lean is by the sound of the motor. If it sounds deep and bogged out, it is. If it screams, it is lean.

Honestly, with that many mods I would get a tune. I would look at the ignition too if it wasn't a consistent cut out. With it doing it at the same time and rpm, I would look at a tune because something seems wrong. You can troubleshoot all day long but, if something is wrong with the fuel, it can burn your stuff.

uedlose

What are your A/F at? you keep saying rich. did you close the gap on the plugs? I would ditch that C&L meter and get a PMAS or a Pro-M for the injectors that you have. I never had much luck with the C&L running NA and even worst when I add boost to one without a way to tune with it. Is your FMU adjustable?

89 mustang

man im just going to get a tune! i was also told that i was geting fuel cut but from the ecu cuz of all the air flow it dont know what to do with the fuel or something like that so the only way is by a tune so im going with 42lb injectors and a lightning maf sensor sso no more fmu. but tanks guys ill let u guys know how it gose!

TrimDrip

I would talk to a tuner first before buying the meter. You may be maxing the lightening meter out.

89 mustang

hey guys i fixed the problem!! it was my tps sensor the hole time it had .00 volts. put a difrent one in and man it runs great!! but thanks for the healp!