g3mustang

I I just got done installing my s/c install and I'm having a surge problem under load... I can't understand why..... I installed my fmu before I put in the s/c and it drove fine... Installed the s/c having surge under light load I don't even have to go into boost for this to happen

90_Mustang_GT

What sparkplugs do you have and what are they gapped at?

g3mustang

Autolight 24 they used to be gaped at .042. But I was having a surge up top.. Know they are gaped at .032 and I feel like it made the car worse but idk

90_Mustang_GT

thats the same plug i run, i had bad problems at high rpm's cutting out, gapping the plugs to much will cause the spark to be blown out. I have mine gapped at the same thing you do. Do you have an aftermarket ignition coil, what kind of wires are you running? Cap and rotor stock? Ignition box will be a very good upgrade. Not saying that these are any of your issues but a good place to look. Whats your timing set at? Usually a 10 degree timing is good for a sc car, thats what ford set them at stock. Have you had your car tuned since putting the paxton on?

g3mustang

Msd cap,rotor, coil and wires.... No ignition box and no tune yet... Maybe a weak tfi module????

TrimDrip

I would run an ignition box with that coil. Take a wire off and look at the spark using a screwdriver and try to determine spark strength.

When I installed my kb, I had a point under load where the car would completely cut off and start again type miss. Like it was out of fuel type lean. Turned out my maf was maxing out. This would throw a light on for a split second though.

g3mustang

I did throw a code for maf high voltage... Could that be a because I'm mis fireing

g3mustang

I really dontt understand what's going on since it's happening even when I'm not in boost and when I drive for 20 min and on

g3mustang

so i reset the timing to 8* and the cars drives alot better... still have the miss up top every once in awhile but better... going to try to retard it to 7* and see what happens..

i ran codes this morning and came up with code 56 maf above max volatge what does this mean and how do i fix it

thanks again guys for all your help

and i already tried putting in a different maf

90_Mustang_GT

http://www.stangnet.com/mustang-foru...s-56-66-a.html. Check this out for your maf questions. Did you convert your car over to maf from speed density? Definately get a tune, and i have read where guys have remounted the tfi module on the side of a fender to keep it from getting hot, because of the problem of not being able to start up car after it has been driven and shut off.