low fuel trim, whacked? idle problem too?

[kyle h.]

well, i just removed all the vac lines other than the EGR valve. So I got rid of the fuel pressure solenoid and the Purge solenoid along with the charc. canister and other junk.

I had the battery out so my fuel trims are all 100%, but my O2 trim at idle is floating around 167%

I've been having an idle problem with the car ever since i got it.

with a fuel trim that high, does it make sence that cam timing would be off?

car runs great other than the funky idle it has.

no vac leaks other than the TB shaft seal. which im getting too.

 

[2.4 turbo Hyped]

What kind of vacuum are you having at idle?? On my logger (mmcd) 167% for a low fuel trim would be really really lean. Tried richening it up?

 

[kyle h.]

10inHg

low trim is back to being stuck at 139% o2 trim is all over the place at idle, not going under 120%

 

[2.4 turbo Hyped]

Sounds like your cam timing is off if you are only getting 10 hg of vacuum at idle. I get 20 hg with stock cams. Check your cam timing.

 

[kyle h.]

is there any read mes on the cam timing? i'd like to read about it before i attempt.

 

[2.4 turbo Hyped]

Do you have a dsm shop manual?? It shows in the manual how to line up tdc timing on the cam gears and crankshaft.

 

[steve]

It's called the timing belt VFAQ.
http://www.vfaq.com/mods/timingbelt-1G.html

Steve

 

[2.4 turbo Hyped]

It's called the timing belt VFAQ.
http://www.vfaq.com/mods/timingbelt-1G.html

Steve

Yeah I forgot about that one thanks steve.

 

[kyle h.]

i'll check that out this weekend. hopfully it will fix my problem....hah yea right.

 

[iamtall77]

timing is really simple on the DSM. all you need is a timing light and a 12mm socket (i think it's 12mm) if you don't have a timing light, check autozone or other stores and see if they have one to borrow. have the car at operating temp. and check your timing marks. you might put some white out on the crank pulley just to make it easier to see. you should have timing at or around 0-5deg BTDC. if it's off, loosen the two nuts on the cam sensor (black hump near the throttle body on the head) turn it, but only a little to adjust timing. once you have it dialed in, tighten it back down and take it for a drive. check it again to make sure it stayed and you are satisfied.
you say you have a TB leak, just buy some o-rings from the parts store-3/8" outside 1/2" inside and 1/16 thick. those work perfect and you only spent about $1 to fix that leak. buy some carb cleaner while you're at it and don't forget to mark all your settings on the TB before removal. (specifically the TPS and throttle plate. if you're idle doesn't improve try adjusting the BISS or even the Idle stop switch. i hade some idle surge until i backed the idle switch (single wire connection, pass side, back of TB) out just a little. my logger was reading almost 14% throttle at idle. i backed it out and now have about 10.7% (10% is stock/normal) if none of the following helps ask someone else.

 

[2.4 turbo Hyped]

timing is really simple on the DSM. all you need is a timing light and a 12mm socket (i think it's 12mm) if you don't have a timing light, check autozone or other stores and see if they have one to borrow. have the car at operating temp. and check your timing marks. you might put some white out on the crank pulley just to make it easier to see. you should have timing at or around 0-5deg BTDC. if it's off, loosen the two nuts on the cam sensor (black hump near the throttle body on the head) turn it, but only a little to adjust timing. once you have it dialed in, tighten it back down and take it for a drive. check it again to make sure it stayed and you are satisfied.
you say you have a TB leak, just buy some o-rings from the parts store-3/8" outside 1/2" inside and 1/16 thick. those work perfect and you only spent about $1 to fix that leak. buy some carb cleaner while you're at it and don't forget to mark all your settings on the TB before removal. (specifically the TPS and throttle plate. if you're idle doesn't improve try adjusting the BISS or even the Idle stop switch. i hade some idle surge until i backed the idle switch (single wire connection, pass side, back of TB) out just a little. my logger was reading almost 14% throttle at idle. i backed it out and now have about 10.7% (10% is stock/normal) if none of the following helps ask someone else.

Cam timing not ignition timing.

 

[markgholland]

timing is really simple on the DSM. all you need is a timing light and a 12mm socket (i think it's 12mm) if you don't have a timing light, check autozone or other stores and see if they have one to borrow. have the car at operating temp. and check your timing marks. you might put some white out on the crank pulley just to make it easier to see. you should have timing at or around 0-5deg BTDC. if it's off, loosen the two nuts on the cam sensor (black hump near the throttle body on the head) turn it, but only a little to adjust timing. once you have it dialed in, tighten it back down and take it for a drive. check it again to make sure it stayed and you are satisfied.

Forget something? If you don't know, your base timing is off three degrees...

~Mark

 

[steve]

Forget something? If you don't know, your base timing is off three degrees...

~Mark

If we were talking about ignition timing the correct number for the Base setting would be 5BTDC. You'l see about 8 degrees at idle at sea level with the timing adjustment connector off. In Cañon City, CO you'll see more than that because of the alititude advancement.

Once kyle checks his cam tming the next thing to check would be his ignition timing, having that retarded will impact his vacuum reading. But I don't think 9 in hg worth.

Then we are all assuming his guage is correct too. Not kinked somewhere.

Steve

 

[kyle h.]

gauge is correct, already checked the ignition timing it was 5*, ont he logger it shows 8 to 15 up and down up and down. still think my cam timing is off, just no time to check it

 

[iamtall77]

your logger should read at about 8*. mine only seems to cycle when the accelerator is being used. have you found any other vacuum or boost leaks? what is your idle set at? (or trying to be set at) have you tested you ISC? i had intermitted idle surge and irrattic idle for a while. i replaced the TB shaft seals and it got worse. i adjusted the idle stop and got my TPS (on the logger) to read 10.9% (10% should be stock) it runs better than ever. try checking the TPS on the logger. if it reads fine, try looking to make sure the timing marks on the crank, oil pump and cam gears match. you might have a balance shaft out of time making a rough idle and not as noticeable at speed. i'm just throwing options out. this isn't to be taken as a certain diagnosis, but rather a trouble shoot. keep us updated.