stinger bogging under heavy throttle!

[SneakerB]

The car starts fine, idles fine and even drives fine under regular driving, but as soon as i go over about half throttle it starts to bog until i let off. Ive had the check engine light come one twice but goes away as soon as i let off the gas pedal its also not throwing any codes. the car is running at about 13.5 to 15 afr so its running pretty lean at all times even driving normal! the day before this started i put in lucas oil fuel treatment and im wondering if maybe it knocked some carbon loose and clogged an injector.
Anybody else have this problem before? or possible know what it could be? i have it going to the dealer on monday!
THanks!

 

[NS_Stinger]

You sure it's not just traction control and the check engine light you thought you saw wasn't just the traction control light?

 

[SneakerB]

You sure it's not just traction control and the check engine light you thought you saw wasn't just the traction control light?

LMFAO. yes.

 

[MerlintheMad]

I've been posting about this exact same thing for weeks, even the last two days: started this thread last night about it: Can spark plugs cause misfire only under load? I've had the CEL come on exactly once during ownership, after this started: it went out as soon as I backed off to "normal" acceleration (no boost showing on the gauge). I have never added any additives and I'm with a bone stock drivetrain.

 

[SneakerB]

I've been posting about this exact same thing for weeks, even the last two days: started this thread last night about it: Can spark plugs cause misfire only under load? I've had the CEL come on exactly once during ownership, after this started: it went out as soon as I backed off to "normal" acceleration (no boost showing on the gauge). I have never added any additives and I'm with a bone stock drivetrain.

id wonder if your running lean aswell, that fact that im running that lean makes me think its a fuel injector or a fuel filter... im still getting good fuel pressure under load so i think the pump is still good. how many miles are on your car?

 

[MerlintheMad]

id wonder if your running lean aswell, that fact that im running that lean makes me think its a fuel injector or a fuel filter... im still getting good fuel pressure under load so i think the pump is still good. how many miles are on your car?

Pushing 49K miles.

 

[SneakerB]

Pushing 49K miles.

I have 50k on mine, i guess ill let u know on monday if i hear anything back on the issue

 

[Ohiocruiser]

Can a carbon build up on the valves cause it?

 

[SneakerB]

I've been posting about this exact same thing for weeks, even the last two days: started this thread last night about it: Can spark plugs cause misfire only under load? I've had the CEL come on exactly once during ownership, after this started: it went out as soon as I backed off to "normal" acceleration (no boost showing on the gauge). I have never added any additives and I'm with a bone stock drivetrain.

Ended up being a cracked spark plugs

 

[MerlintheMad]

Ended up being a cracked spark plugs

I can only hope!