pmpkin82

hi everyone im very new to this and was wondering why my 1989 mustang gt want start when hot so far have checked timing coil fuel pressure coil fire getting 39 psi fuel also changed tfi module can any one help also how much timing you guys run with 302 b303 cam gt40p heads 1.7 roller rockers and 24lb injectors thats total timing

Rbs93Stang

You may have vapor lock which is when you have too much humidity in your gas tank you can buy products to get rid of that

AdderMk2

I dont think ive EVER seen an EFI car have vapor lock.

next time it wont start, follow this guide.

http://sbftech.com/index.php/topic,588.0.html

91Vert

I had an issue like this on my BBC 72 Chevelle. It would crank up fine when cold, but after I drove it I had to wait for it to cool down a bit and then it would start. My problem was due to the headers touching my starter. I bought a mini torque starter from summit and it would start every time, no matter the temperature.

AdderMk2

you had a "no crank" issue, he has a "no start" issue...

two separate problems

enix187

adder the guy hasn't cleared up whether it turns over or not, and I've had the heat soak problem before with my starter, with a stock exhaust

91Vert

Mine cranked. It was really slow though. Not enough to start it.

AdderMk2

well, sometimes I put too much faith in others... Im hoping he didnt bother checking fuel pressure and spark, just because the car was cranking slow....

whiteNblack95

if it is very consistant, drive it around for a while, go to a pep boys and have them do a $10 electrical test, it could be something as easy as a starter.

alexyikes00

i had, no-slow crank.

I have my battery relocated to the trunk, cable wasnt thick enough so when it got hot, it caused to much resistance, and wouldnt crank until cold...

replaced the cable to a 1gage battery cable, and that fixed it.