b.rome

so after following this thread for about a year, i have built my motor and having some issues that maybe you can help me out on OP, my build is as below

302 xxx block, factory out my 95 xlt
stock rotating assym
forged summit pistons
all fresh bearings
bored .30 and rest cleaned and checked
anderson b-41 cam
AFR 185 heads 58cc
scorpion 1.6 RR
stock upper and lower intake
flow-pro long tubes


my issue is that once i got it running and timed, one day it idled perfect, never died etc. cranked it up next day and it dies after about 30 sec, and dies as soon as you go into reverse, i have to 2 foot it to back it up in my garage, only drove it maybe 1/2 mile down my street

my first concern was being it is a "mustang based" cam the firing order would have something to do with it, but it idles perfect when it does run, so i threw that concern out

after reading your thread i now am putting on an IAC bypass plate on and see what happens.

do you have any other suggestions what could be wrong?

qdeezie

The first thing that comes to mind is the IAC bypass.

Second item that come to mind is the TPS and whether or not the voltage is correct.

Third is there may be some sort of issue with the torque converter causing it to stall the engine out. Sometimes when fresh HP is put up against and old TC, it will kill the TC.

This is what comes to mind based on your description.

b.rome

new TPS and set to .92v because it was dead, and new trans and converter as well. its completely re-done. im also going to check my computer to see if the capacitors are leaking

b.rome

So did the plate and made it worse. Won’t even start unless I feather the gas. Cracked open the computer to see if it was corrected and it looks great.

sdmartin65

I've gone through a few different cams on my 302 and finally settled on a Comp Cam RV type grind. I also used stamped rockers and stock push rods, the push rods measured perfect with the Comp Cam. Max rpm is 5500 with my stock computer so I didn't see any benefit to rr. From my experience I'd say your problems stem from the Cam you have for one and then it's coupled with an auto trans causing more problems.

b.rome

I did a ton of reading yesterday and im sure now its the cam, apparently the 94-95's have a really sensitive computer and my LSA is too low causing the idle issues, its at 112, i need something more along 114

going off what these people are saying (post 11) it makes sense
http://forums.corral.net/forums/94-9...-camshaft.html

so im looking at getting the comp 249-35-349-8

(explained more on this link i found)
http://www.hotrod.com/articles/camsh...ted-explained/

sdmartin65

Sounds like a good choice, I ran the 35-512-8, basically the same Cam just toned down a bit. Great power from idle on up and no drivability problems. Produces a bit less vacuum so occasionally I get a CEL but I'm also at high altitude.

Definitely need upgraded valve springs.

qdeezie

For what it's worth, I've been told that the 35-349-8 camshaft is a bit soft down low on trucks, so your truck might not pull out of the hole as hard as it could with the 35-512-8 camshaft. It will run just fine, but something to keep in mind......

Jlopez21

I've got a 92 f150 that I'm going to swap a 302 from a 88 mustang gt the engine is going to be all stock. My main concerns are the wiring harness and the ecu and how I can make the swap work and where can I find a wring harness and ecu to work properly?

sdmartin65

Use the trucks current ecu and wiring harness. Route wires to the HO firing order, if using truck distributor swap gear with one from the Mustang.

The truck is batch fire injection meaning all injectors on one bank pulse at the same time. Don't over think it there is really not much difference between HO and non HO and batch vs sequential. Best thing you could do is pull that mustang cam out and use one from a truck.