Car is Spuddering

[bonnieandclyde]

i am going to change out the wires and plugs this week and i will see if that helps. if it does not i will post back on here and get some more touble shooting advise.
also what is the gap setting on the autolite 605 plugs?
thanks for the help

[bonnieandclyde]

what are the gap settings for the 605 pliugs

[01bonneSC]

.060 iirc. will also be on your catalyst sticker in the engine compartment. And also in your owners manual.

[bonnieandclyde]

ok i changed out my wires and plugs and still doing the same spuddering. what would be the next thing i need to check out?

[cooljoe51]

Is your SES light on?

[bonnieandclyde]

no

[bonnieandclyde]

anyone know the next step to take at this point?

thanks

[01bonneSC]

Spuddring at idle or...? When does it sputter?

[01bonneSC]

Remove the IAC and see how dirty the plunger is.

Also, check the TECHINFO section for the procedure to test the throttle position sensor. Test it and see what it does.

[1oldman]

Ed, should he go to a parts store and have them see if there are any diagnostic codes stored and if they are current or historical? - BC

[01bonneSC]

And you are using PREMIUM gas, correct?

[00Beast]

Wouldn't hurt to see if there's any codes stored.

[bonnieandclyde]

i have the elm 327 code reader and the only code i got was the p0171. also i do use premium gas all of the time. you definately have to with superchargers and turbos.
it spudders when i am trying to give it gas. and at idle it sometimes the rpms go way down like its going to shut off and then goes back up. but mainly when im driving and hit the gas it sputters at that point.

[00Beast]

P0171 = System too lean (bank 1). Running lean would cause misfiring, etc. Have you checked fuel pressure?

[01bonneSC]

Have YOU ever replaced the O2 sensor?

How many miles on the car?

[bonnieandclyde]

i have not checked fuel pressure. i dont know how to. also i changed out the cat but not the 02 sensor. would a bad o2 sensor make it spudder like it does?

[00Beast]

The front O2 could cause issues, but not something this severe.

To check fuel pressure, you'll need to rent a gauge at a parts store, then it just screws onto the schrader valve on the front of the rail that looks identical to a tire stem. There will be a black rubber cap on it.

[bonnieandclyde]

is that the fuel pressure releif vavle?

[00Beast]

It's not a relief valve, as it doesn't relieve pressure if there's too much, but if that's what someone's called it, then yes, lol. It's on the front of the fuel rail.

[bonnieandclyde]

ill try that first and see if it is that. is there instructions on how to use the gauge? like what number it should be?