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spamdaddy
02-04-2011, 02:10 PM
1994 SC auto with 122K. Car runs well under normal driving. However when I put it to the mat, the car seems to breakdown and miss when the boost is around 13-15 psi. I have replaced the coil, fuel filter, and PCV. I have not tackled t he plugs and wires yet. I have observed that if I manually shift the tranny that the miss is less or gone completely. Any ideas on what may be causing this problem?:confused:

S_Mazza
02-04-2011, 02:17 PM
1994 SC auto with 122K. Car runs well under normal driving. However when I put it to the mat, the car seems to breakdown and miss when the boost is around 13-15 psi. I have replaced the coil, fuel filter, and PCV. I have not tackled t he plugs and wires yet. I have observed that if I manually shift the tranny that the miss is less or gone completely. Any ideas on what may be causing this problem?:confused:

Probably your plug gap is getting too wide.

MagpoweredSC
02-04-2011, 07:22 PM
Plugs and wires would be my first suspect.

91BLOWNBIRD
02-04-2011, 08:51 PM
missfire...plugs/wires #1

whitecl0ver
02-04-2011, 08:52 PM
same here, I had an old 84 EL Camino with a 305 V8 and when you got on the gas and missed....New plugs and wires she was all good...

spamdaddy
02-04-2011, 11:40 PM
Thanks for the replies. I was leaning in that direction, but was just putting off the job. I am sure it will be a ~~~~.

91BLOWNBIRD
02-05-2011, 07:38 PM
not too mad...go from underneath the car...most of us can do it on a stock SC in less than 2 hours

you can search it here on forums too and get some tips and tricks