Engine problem

[ZCNY2002]

when i drive the car feels like the turbo spools up and then at 3000rpm it starts to stutter and backfire also at 3000rpms the turbo is at 20psi i just got the car last week don't know much about it also i noticed some oil leak on top of the engine thought it was the oil cap but it is still there after replacing the cap i took some pictures any help be great also my A/F gage is always on lean but no engine light is on here are the pictures

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[b-morr]

First off, use some periods and commas to make your writing easier to read. Does your dipstick pop out?

 

[ArticNemesis]

Fill out your profile completely, including modifications.

It looks like you are still on the stock t25 and an almost stock setup. You shouldn't be boosting 20psi, the stuttering you are talking about could very well be fuel cut.

The AF gauge you have is junk. Toss it and invest in something useful.

 

[dimon2000]

i had the same problem with the oil leak. turned to be the valve cover. check your valve cover where the spark plug wires go on the buttom right corner. you might have a small crack, and that will make oil go everywhere once the car is warm

 

[ZCNY2002]

no dipstick is good doesn't pop out, now what you mean with fuel cut off ??? bad pump ??? also i got this screw thing i believe its the MANUAL BOOST CONTROLLER, ill take a picture of it and post it

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also the hose for the turbo gauge kept popping out of the plastic tee, so i made my own i thought that was the problem but it's not

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[ArticNemesis]

You can't boost 20psi on the stock fuel system. Turn the boost downin the 12-15 range and go read the forums/check out the upgrade path.

 

[mndsm1]

have you ever owned a dsm/turbo'd car before?

 

[ZCNY2002]

no first one i just picked this one up so thats why i need help the kid screwed something up be nice if anyone that lives in NY and has some DSM knowledge could help me and look at the car

 

[mndsm1]

no first one i just picked this one up so thats why i need help the kid screwed something up be nice if anyone that lives in NY and has some DSM knowledge could help me and look at the car

Your first step should be to turn down the boost using the boost controller that you have. I would agree with the post uptop (12-14 lbs) should be perfect for the mean time. The reason that you would be getting fuel cut is because you a pushing more air into the engine then fuel causing the car to feel like it hits a brick wall, meaning in order to fix it you have to turn down the amount of boost the car is getting. And yes that air/fuel gauge is useless. You should try to invest in a AEM Wideband.

 

[ZCNY2002]

if i take the boost controller out will it go to stock boost ?? i am trying to read up on it right now on the forums don't know how to use a boost controller

 

[mndsm1]

If you were to remove the boost controller you would have to have the stock boost solenoid plugged back in which would be pointless. If you want to decrease the boost, you want to have more thread, to increase you would decrease the amount of thread.

 

[ZCNY2002]

ok ty i try that tomorrow morning and will post the results

 

[ArticNemesis]

If you run the vacuum hose from the turbo compressor housing straight to the wastegate, you will get anywhere in the range of 10-14psi, so yes, you could remove the MBC to get the boost into manageable ranges.

 

[ZCNY2002]

ok i turned the boost controller all the way down and that fixed the problem, it runs on 11-12 psi now, wonder why the kid turned it all the way up??? i think i found the oil leak too i took out this piece on top of the valve cover looked like a grounding clip, ill take the car out later and double check, ill also will take a picture of the piece and see if you guys know what it is