sr 20 bogs to 15mph

[nvsn8]

i have a problem with my SR.i t has been fine no problems till now... i was driving then i shifted and heard a backfire then the sr completely boged down and it runs terrible wont go more then 15 mph and there is white smoke coming out the back. I just looked at the plugs and they have a dry black coating on them.. that means its running ritch. Im gonna clean the plugs I doubt this will fix it but who knows, also im thinking timing or o2 sensor? could be the turbo be busted? does this sound like a broken turbo? the engine isnt loud just the exhaut is loud from running poor. any help would be helpful thanks

[soilwork240sx]

sounds like coolant burning if its white smoke

[SpeedRacer1]

Piston rings? > Super slow acceleration

Did you mess with the timing? Timing shouldnt go bad by itself but if you mess with it, it will most likely break something.

[Cyberkreig]

will it rev in neutral?

limited revs + running rich =? MAF

[nvsn8]

i just changed the plugs ,, didnt fix actually now the smoke is dark it revs in neutral but no power.

[SWIFT_DRIFT]

I would definitely check the turbo.

[nvsn8]

shouldnt the car run even if the turbo is not working? just with no boost?

[SWIFT_DRIFT]

Yes, sorry I got confused. Sound like you are going to have to tear the motor apart (or have a shop do it). Then you mine as well check the turbo while you're at it. There rephrased lol.

[nvsn8]

well here basically my car wont rev past 2000 rpm maybe someone knows what that means?

[SpeedRacer1]

Well if its not revving past 2000 it might have bad compression somewhere. Did you floor it to try to get above 2000? Try a compression test, and if it fails that do a leakdown test. There shouldnt be anything in an ECU that would cause this problem but try to swap ECU's with someone local to see if thats the culprit.

[nvsn8]

it will rev past 2000 in neutral not in gear tho

[240_Keyy]

will it rev normally to redline in neutral?

[SpeedRacer1]

Do you have a boost gauge?

[nvsn8]

yah it will rev to redline in neutral, i dont have a boost gage. it sputters grey smoke, its running very ritch

[SpeedRacer1]

Gray? If it has a bluish tint, thats oil. Your spark plugs were black right? Unless there is excessive black on there, running rich isnt your problem. The SR runs rich naturally to protect the engine from detonation.

[nvsn8]

yah i know it runs rich normally, but i was thinking something with air fuel mixture is messed. hoping it simple like MAF or somthink poped off

[SpeedS13]

went from white smoke, to black smoke, now grey? no clue here all i can suggest is checking your head gasket and checkin your fuel pump and filter to see if its gone bad or not.

[SpeedRacer1]

You really need to do a compression test, you should be able to pick up the tool from an auto store for less than $30.

[MojoMan]

Have you checked intercooler piping. It proly isnt the problem I was just curious. Check your vacuum on the throttle body and everywhere else. How hard where you driving it? Definitly check the compression and the MAF. Also are there any noises in the motor. You get the idea.

[RobDET]

my money is on an electrical problem. Get out the multi checker and start running down the sensors. I had an old MR2 that had the same symptoms and it turned out that my car had a bad coolent temprature sensor. replaced it and Vroom Vrooom.... but TPS, AFM, and Intake Air temp (if they have 'em) sound very fishey.

:: edit::

Ignore that... my money is on a head gasket... i missed the backfire and WHITE smoke part...

[Movingviolation240]

yea that sounds like a electrical problem IMHO. Check the MAF to make sure it works right, but I'd look into the o2 sensor housing while your at it. Just try to unplug the 02 sensor and see if it runs better. You could also try to adjust the timing just to see what happens.

The if it was the MAF it would not rev past 2000rpm and backfiring and poping. If I remember correctly if it's the 02 sensor it would do the same stuff at like 3000rpm.

PaulOrlando, FL

[AznRide]

Yea, try the mafs or the TPS about the rev limit under load. About the smoke...you might blow the head gasket. Does your turbo make a loud noise? If so, it's your turbo. But then again, do a compression test first before you start changing.

[Samabra]

Try the compression test as well, also check your oil level (my friend was buring blueish smoke, and it was cause his oil level was too high) Chris

[Joe]

it honestly sounds like its running too rich and bogging out, i know that a disconnect charge pipe for the intercooler will cause a problem just like that, motor dosent see boost but adds fuel for it because its supposed to be there and it bogs out.

definatley do a compression or leakdown test.

[MojoMan]

NVSN8 did you ever figure out your problem?