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Misfire in all cylinders except #1

talontedGTP

talontedGTP

New member
ok so i am new to the gtp scene, i just got a 97 with 228k but the top end is freshley rebuilt, new blower thats ported and polished, ported and polished intakes, heads are ported and polished with a 3 angle valve job, and it has a 3.4 pulley... now heres the thing, i have misfires in all cylinders except #1, what plugs should i go with with these modsi was gonna go with 10.3 wires from zzperformance and get new coils to try to get the misfires to go away, so what plugs should i use?>
 


get ac delco wires or duralast wires from autozone or napa, they work great. ZZP wires are overkill and dont seem to work great.

Get some autolite 605 copper cores and gap them to .050 or so.

Do wires and plugs first before buying coils, just to make sure whats going on.

and having a 3.4 without exhaust mods is asking for trouble.
 
i have the 3.8 sc and it does have exhaust work, it has cat delete and resonator delete so its straight pipes to the stock mufflers, im takin it to the exhaust shop to have a cat put on and flowmaster 40s, and upgrading to 3 inch from the y pipe back untill i get headers and downpipe
 
talontedGTP said:
i have the 3.8 sc and it does have exhaust work, it has cat delete and resonator delete so its straight pipes to the stock mufflers, im takin it to the exhaust shop to have a cat put on and flowmaster 40s, and upgrading to 3 inch from the y pipe back untill i get headers and downpipe
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I know what kind of motor is it, lol. all GTP have them.

There is no exhaust restriction from the catback, trust me, dont go wasting your money on doing 3in exhaust, there is no point to it.

The exhuast mods you need is headers, the front mainfold is un godly restrictive and with the 3.4 on there its prolly KR* ing like a mofo. It's going to chip a piston real quick if your not careful and take it off before its to late.

Dont put flowmasters on there, your ears are going to bleed from the god awful drone. Buy some magnaflows or borla, flowmasters are chambered mufflers and those are the ones you DONT want, they suck.

FYI: headers come with a downpipe, you dont have to buy both.
 
thanks for all the info, im still learning about the car, any idea where i can get a decent set of headers that wont hurt my wallet? i dont need anything crazy, just want a little more power and better sound
 




so i should pretty much baby it untill i get new plugs and wires and get the misfires to go away, then i can do exhaust mods
 
My buddy has a 2000 sc riviera and doesnt have the sc belt on and he is gonna let me use his pulley untill I get some mods, is there any way to get the pulleys off without the kit? I dont have $110 to get the puller right now
 


ok, i can just take his off and put it on mine without draining the charger oil or anything? its only gonna be for a few weeks untill i get headers, port my tb, and get a pcm tune
 
nope, you gotta suck the oil out and take his snout off and re seal it with anerobic sealer when you put it back on.

porting your tb aint really worth it, in my opinion, you need a custom tune after doing that. Id just leave it be.
 
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