Cylinder misfire under moderate throttle?

[slowchevy]

having a weird problem with the car..if I Drive the car gently with under half throttle or so it runs fine. if I give it anymore throttle it starts to misfire.

its only on one cylinder (cyl1) which leads me to believe I have a possibly bad fuel injector? Any help much appreciated

Here's a video of what's going on

Click to read more...

 

[Yaj Yak]

could be wires/coils as well.

 

[slowchevy]

if it was a coil wouldn't it be two cylinders at once? Idunno

 

[slowchevy]

just did plugs and wires like 20,000 miles ago

 

[Bob Kazamakis]

Check your #1 coil and see if it has any corrosion.

 

[Yaj Yak]

if it was a coil wouldn't it be two cylinders at once? Idunno

no

 

[slowchevy]

Check your #1 coil and see if it has any corrosion.

where would i look.. on the bottom where the leads go into it when you un bolt the coil?

 

[Lord Tin Foilhat]

Corrosion is pretty dam obvious...

 

[Bob Kazamakis]

where would i look.. on the bottom where the leads go into it when you un bolt the coil?

Pull plug wire, use eyeballs.

 

[slowchevy]

Waiting for everything to cool down and I'm going to go look, thanks for the suggestions guys

 

[Yaj Yak]

dude it's on the very top of the engine, you'll be okay... just pull it.

 

[Mook]

This car has been nothing but problems

 

[slowchevy]

Problems I caused..

 

[99PONTIACGP]

Problems I caused..

Problem #1.

Use the panda mentality. Stock.

 

[Euro]

It basically is

 

[Bru]

Does it have headers? Sounds like a plug wire burnt on the header. Sometimes they burn on the backside and visibly appear fine until you yank on it. I've had the protected Kevlar boot covers burn through and ruin a wire as well.

 

[RICH17]

What plugs? Copper 104s dont last long

 

[Bruce Jibboo]

did you swap the coils, two bolts per coil?

 

[Bob Kazamakis]

I changed copper core plugs twice a year

 

[b4black]

Does it have headers?

Things listed in his signature are what he calls "future mods".

 

[Bru]

Things listed in his signature are what he calls "future mods".

I have sigs, pics and avs turned off.

 

[02BlueGT]

A 3800 with 20,000k on the same plugs? You running iridums bro?

 

[1quick]

What plugs are they, if copper I would start there, if that dosnt fix it swap a coil and see if the miss follows if not run the car at night in the dark and watch for arks or just put new wires on it, do that and follow up on here

 

[slowchevy]

What plugs? Copper 104s dont last long

That's what's on there...

Going to toy with it tomorrow and see what I dig up. Haven't had a chance to fuck with it tonight

 

[slowchevy]

Things listed in his signature are what he calls "future mods".

Soon. They're hanging in the garage