[HybridAWD]

Yeah so I finally went to correct my timing issue.

Idle used to be around 10-12 vac and very erractic and lumpy. Other than that car drove ok. Thought this was due to timing belt being slightly off.

So moved the exhaust gear back one tooth.
Now idle is very steady at 13-14 vac. The car doesn't rev very well. Almost like a 2-step when trying to rev in neutral. Get random backfire at idle also.

Have screwed around with base fuel pressure, safc and biss but can't find a healthy medium.

Have not tried driving the car yet.

If a cracked valve cover effects anything well yeah cracked that upon reinstalling it.

 

[XtReMeToYz]

Yeah so I finally went to correct my timing issue.

Idle used to be around 10-12 vac and very erractic and lumpy. Other than that car drove ok. Thought this was due to timing belt being slightly off.

So moved the exhaust gear back one tooth.
Now idle is very steady at 13-14 vac. The car doesn't rev very well. Almost like a 2-step when trying to rev in neutral. Get random backfire at idle also.

Have screwed around with base fuel pressure, safc and biss but can't find a healthy medium.

Have not tried driving the car yet.

If a cracked valve cover effects anything well yeah cracked that upon reinstalling it.

Are you positive the timing is right, or did you just guess where that gear was supposed to go? You might wanna do a whole teardown of the timing belt and retime everything. Ive had to do it enough times that youd wanna puke.

 

[Heat]

I'm not sure the timing is right. Hybrid AWD and I did the t-belt along with some other stuff a while back. Resulted in what I explained above.

Tried fixing it today, and results are above.

First way, idle was really bad, but car drove decent.

Now idle is decent but the car is not driveable.

 

[XtReMeToYz]

What exactly was done? Did you just pull the timing belt back a bit and just move the came? Id be willing to bet your timing is off, but their is no way to tell unless you pull it all apart and line all the gears up. Their is a good vfaq for it if you arent entirely sure how to do it. For now though, id check the timing unless anyone else has an idea?

 

[HybridAWD]

ok so check it out,
originally we installed 264/272 combo into this car: we had the exhaust off 1 tooth

car's timing is now right, i stripped the car down and looked at everything to double check myself.

So now that the timing is right the car idles fine, has random back fires at idle and revs really crappy

so to narrow everything else out,

the wires are a few months old
the ngk's are a few months old

fuel pressure is between 35-40 with vaccum on

the cars backfire is coming out of the exhaust not the intake

when we zero out the SAFC the car smells really rich but doesnt backfire

 

[XtReMeToYz]

What else is done to the car? I checked your profile but their wasnt anything there. Im assuming injectors if the SAFC was being used? Also, check for boost leaks, check engine lights, and when all else fails try and possibly reset the ECU to see if anything screwy in the past effected the way the car was running. Keep us up to date

 

[Heat]

The car has large injectors, upgraded pump and 6an lines. Safc and afpr.

The condition in question is being caused by too much fuel. Why though?

2step cuts spark and creates a rich condition which is almost exactly how this car revs.

Backfire is igniting unburnt fuel in the exhaust.

Why is this happening?

zeroing out the safc does not eliminate the backfire so please ignore that.

Boost leak is very possible but not enough to cause a condition this severe.

The car does have a cel from disconnecting the stock fuel pressure solenoid and of course the ever present p420. This is a non-factor also, I just haven't gotten around to reinstalling the pocketlogger software on my palm pilot after the batteries died.

I had already come to the conclusion there was too much fuel before we made this thread, I just wanted someone else to suggest that before I put it out there.

Anyway back to that point, too much fuel at low rpms/idle, how to fix it?

Turning the safc down to -44ish for the 1000 rpm point on low throtle doesn't seem to help.
Neither does turning down base fuel pressure.
Before you ask no the injectors are not too large for the safc to handle.

 

[reese]

Boost leak is very possible but not enough to cause a condition this severe.

yes it is. i didnt have a leak but i had my lower ic pipe crimped so it wasnt flowing and i had the EXACT same symptoms as u. check the ic pipes for kinks.

 

[Heat]

I am saying it's not an issue in this specific case.

A kinked pipe != to boost leak unless the pipe is cracked anyway.

We didn't touch any of the intercooler piping. Car drives fine before we touch it, just idles bad.
We take 20 minutes moving the exhaust gear back one tooth, touch nothing else.
Now the car idles great, but is undrivable for reasons aformentioned.
I don't think intercooler piping plays a roll in this specific case.

It does bring up a good point though. In your case the rich condition was caused by lack of air flow not too much fuel.

Could that be the case here?