SVT70

I bought a 94 lightning with a mass air conversion and it pings real bad. I set the timing put 93 octane gas in it and it still pings. any info will help.

lightning_2000

let me guess its got the fms kit?

back the timing down a little.. that kit likes to add timing..

SVT70

It's funny you say that if I take out spout it doesn't ping as bad. thanks

Frank 93L

Because that keeps the PCM from advancing the timing.

Frank 93L

Because that keeps the PCM from advancing the timing.

ford572

just installed the fms mass air kit on my f150 and it was pinging too. just turned timing back for now.

jwbronco

The FMS kit for the lightning doesn't have a whole lot of timing. Maybe it's something its like a bad mass air meter and it's not a timing ping but a a/f ratio ping.

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94 Lightning, stock shortblock, AFR 185 Heads, Edelbrock RPM intake, 75mm throttle body, Jay Allen Roller Camshaft and Mass Air 60lb injectors and a NOVI 2K

getblown

Another thing it could be that a lot of people don't think of is the balancer has spun inside the hub. If it is still the original look to see if any rubber is sticking out. We had a mustang that would ping if you tried to set the timing at 12, When you would set it by ear and then check it with the light it would read something like 50 deg ATBC. Just trying to give you something else to think about.

NickWay

where can i pick up a mass air conversion

giddyup

check the classifieds.....