back fire??

whitepony · 04-11-2003, 10:25 AM

i have an 88 gt with a few mods, but there is a small bck fire in the intake when i really get on it a first then i t will back fire and be fine till i get on it again. would that be somthing with fuel my fule presure is fine between 30 and 40 all the timevacume lines are all right. would it be something in the computer like will the computer take a while to recognise the my f cam and shaved heads and port intake and heads??

plez help me summer is here and i have no poney to drive

eeh1025 · 04-11-2003, 12:09 PM

Hey man mine 89 is doing the same thing, it like when you are driving and then you hit the gas to go fast it hesitates and make a backfire sound is that what your is doing.
Ernie

ponyboy25 · 04-11-2003, 01:00 PM

I don't know if it's necessarily the same situation, but I had a small problem with hesitation a few years ago. My problem was solved by purchasing Taylor ignition wires to replace my old Motorsports wires, which were arcing pretty bad on certain cylinders.

66StangGuy · 04-14-2003, 01:59 AM

sounds like it could be a timing or timing advance problem.

have your changed your timing from its stock setting?

also check to see that it is stock or whereever the cam or other parts specify. i had the problem on my car with my timing was too advanced. it would hesitate for a second before it would take off and had small backfires while trying to start the car after it was warm.. tapped the timing down a little and the car starts perfectly every time and the hesitation is totally gone. what a big difference that made.

whitepony · 04-14-2003, 10:34 AM

i just put a new set of taylor wiers on.
my timming is set at 14% i dont know what else to set it at

WADS56 · 04-14-2003, 01:00 PM

Quote:

Originally posted by whitepony
i just put a new set of taylor wiers on.
my timming is set at 14% i dont know what else to set it at

Unless you have a new cap and rotor get them. Are your plugs old, and what are they gapped at? Unless you are SURE that the ignition system all checks out don't bother spending money on new parts.
After that check the fuel pressure with the vacuum off. If you are a 30psi at WOT chances are you are going lean, which will cause a intake backfire sometimes.

04-11-2003, 10:25 AM	#1
whitepony Registered Member Join Date: Feb 2003 Location: ontario canada Posts: 165	back fire?? i have an 88 gt with a few mods, but there is a small bck fire in the intake when i really get on it a first then i t will back fire and be fine till i get on it again. would that be somthing with fuel my fule presure is fine between 30 and 40 all the timevacume lines are all right. would it be something in the computer like will the computer take a while to recognise the my f cam and shaved heads and port intake and heads?? plez help me summer is here and i have no poney to drive

04-11-2003, 12:09 PM	#2
eeh1025 Registered Member Join Date: Feb 2003 Location: NJ Posts: 81	Hey man mine 89 is doing the same thing, it like when you are driving and then you hit the gas to go fast it hesitates and make a backfire sound is that what your is doing. Ernie __________________ 93 GT 351 to 393 stroker, GT40 upper and lower intake, GT40X Turbo Swirl heads, holley 80mm throttle body, 255 fuel pump, 42 lb injector, JE pistons, Comp cam, comp lifters, comp pushrods, comp springs, crane Roller rockers. Trick flow Crank Shaft, comp Timing chain. MSD 7 series ignition, msd hvc2 coil, MSD timing adjust, MSD Pro billet Dis, Hooker long tube, Off road H pipe 1 chanber race flows, 4.10 gears, Vortech cooler and T-Trim with a 25lb boost AND LOTS MORE.

04-14-2003, 01:59 AM	#4
66StangGuy Registered Member Join Date: Feb 2002 Location: Diamond Bar Posts: 258	sounds like it could be a timing or timing advance problem. have your changed your timing from its stock setting? also check to see that it is stock or whereever the cam or other parts specify. i had the problem on my car with my timing was too advanced. it would hesitate for a second before it would take off and had small backfires while trying to start the car after it was warm.. tapped the timing down a little and the car starts perfectly every time and the hesitation is totally gone. what a big difference that made. __________________ 66 mustang-292-Holley 4160-World Castings Windsor Sr.-Hooker super comp headers-MSD box & Coil.3.55 gears. B&M Z-Gate-Black leather racing seats with 4pt harnes.

04-14-2003, 10:34 AM	#5
whitepony Registered Member Join Date: Feb 2003 Location: ontario canada Posts: 165	reply i just put a new set of taylor wiers on. my timming is set at 14% i dont know what else to set it at

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04-11-2003, 01:00 PM	#3
ponyboy25 Registered Member Join Date: Mar 1999 Location: Chicago,Illinois,USA Posts: 51	I don't know if it's necessarily the same situation, but I had a small problem with hesitation a few years ago. My problem was solved by purchasing Taylor ignition wires to replace my old Motorsports wires, which were arcing pretty bad on certain cylinders.