it keeps pulling a random misfire code Help please

[srGS-t]

ok i have a 1995 gst and for the last few weeks the car has pulled a random misfire code every now and then i just put new stock NGK R i cant think of the part # but there brand new and the i didn't change the gap on them should I ???? is there anything that could be causing this. it docent happen when I'm at WOT or anything it just happens when I'm barely on it at all like 70 on the interstate????? any help

 

[blcknspo0ln]

ok i have a 1995 gst and for the last few weeks the car has pulled a random misfire code every now and then i just put new stock NGK R i cant think of the part # but there brand new and the i didn't change the gap on them should I ???? is there anything that could be causing this. it docent happen when I'm at WOT or anything it just happens when I'm barely on it at all like 70 on the interstate????? any help

Look I already found ya

NGK BPR6ES if you're close to stock
NGK BPR7ES if you're mildly modded

gap both to .028, they come pregapped at a crazy .040 or something like that.

test your coil pack 1-2 & 3-4 @ 30k ohms each. You have to make a connection all the way in the back of the coil to read the resistance properly.

goodluck Scott

 

[fostytou]

is it a 6 bolt?

 

[dave99gst]

is it a 6 bolt?

nevermind if its a 6bolt - does it have a 1g CAS ?

 

[gurmanator]

try changing the plug wires...turbo dsm's are bad for eating plug wires bacause the way they route over the valve cover and under hood temp.the heat cooks the wires and after time the wires start to arch against each other but my cel code told me it was the coil pack.it was something simple..,go figure.

 

[AWDtsi1995]

If it does have a 1g CAS try this:
http://www.magnusmotorsports.com/article_1g2g.htm
Its towards the bottom of the page.

 

[Vallary99]

This is if you are an OBDII:

Oddly enough, mine threw the P0300 (random misfire) code today. Generally, it's your plugs or wires. Make sure all you wires are plugged in all the way at the valve cover and the coil packs. If you are running too rich, your plugs may be fouled out also causing random misfire. Check those too. If you have a Haynes manual, the back has pics of plugs and what they might look like. If you are modded you need to run one step colder than stock plugs, NOT iridiums. Just ge tthe NGK V-power ones and regap them to what blknspooln said.

 

[srGS-t]

ok i ckecked my plugs and there fine look good but i tried to test the coil pack and it read 14.65 omhs on both coils sooo im a doing somthing wrong or is that ok but one thing is if it pulls a code and starts to miss bad i can rev the car out and it clears it up sooo how can it be the coil packs anyideas

 

[blcknspo0ln]

Your coil pack is on it's way out, that is why it is behaving that way. Find yourself a new coil pack and you should be good to go