Urgent Motor Help Needed After Tuneup

[PlayingWithTBI]

How would I check the timing chain for slack? Motor has around 120K on the clock

On my previous post - watch the rotor while turning the crank back and forth.

 

[Nick88]

So should I watch the IAC position when it starts surging to rule out IAC? the vacuum bounces up and down slightly when it surges but i think its because the rpms bouncing.

 

[Nick88]

On my previous post - watch the rotor while turning the crank back and forth.

Ill check that soon, Ive turned the rotor before though from the crank when doing distributor work but I never noticed any slop its pretty much immediately turned the second I turn the crank.

 

[Nick88]

Any possibility it could be from the misfire the o2 is just completely gummed up from the raw gas and is reading way lean? I might try pulling it out in a bit and just leaving it to soak in electrical parts cleaner see if that helps

 

[PlayingWithTBI]

I might try pulling it out in a bit and just leaving it to soak in electrical parts cleaner see if that helps

Don't do that, you'll ruin it for sure. There's a little port that lets air in so it can create voltage comparing it to the O2 in the exhaust. If that gets plugged, it's garbage.

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I didn't read all the way back - do you have a scanner or TunerPro RT? You can monitor your O2 feedback and watch for cross counts. If there's none or it's slow to respond, replace it.

 

[Nick88]

Don't do that, you'll ruin it for sure. There's a little port that lets air in so it can create voltage comparing it to the O2 in the exhaust. If that gets plugged, it's garbage.

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I didn't read all the way back - do you have a scanner or TunerPro RT? You can monitor your O2 feedback and watch for cross counts. If there's none or it's slow to respond, replace it.

Yes I have ALDLDroid I have good crosscounts

 

[PlayingWithTBI]

Yes I have ALDLDroid I have good crosscounts

Then what makes you think the O2 sensor is bad?

 

[Scooterwrench]

Yes I have ALDLDroid I have good crosscounts

Hmm,maybe take Orpedcrows's advice and check for vacuum leaks. You can use carb cleaner or an unlit propane torch and go around the TB base,EGR base,vacuum hoses and intake rails. If there is a leak it will change the idle as it sucks the gas in. For $hits and giggles pull the EGR vacuum hose off and see what happens. A malfunctioning EGR control valve could be pulling the EGR open when it's not supposed to.

 

[Scooterwrench]

Then what makes you think the O2 sensor is bad?

That's probably my fault thinking he may have shocked the O2 sensor when running water down the intake.

 

[PlayingWithTBI]

That's probably my fault thinking he may have shocked the O2 sensor when running water down the intake.

Ahhh, I get it.