I Have a 90 TGP......just rebuilt the turbo, new fuel pump, water pump, fan and fan motor, new cat, plugs and wires etc. I can ease into the gas pedal and the car will run slowly but when I push hard on the gas petal the car wants to stall and makes no power. I'm at a loss right now. Has anyone had that problem or any ideas. Thanks.......Pete
Could be a few things.
First off...do you have the stock air intake system in place to include the corrigated inlet hose going to the turbo inlet? OEM airbox also with paper filter? or are you running a K&N or similar in place?
Are you running the stock boost control system or Manual Boost Controller? Have you ensured the lines are back in place properly if still factory controller?
Was the turbo rebuilt or new from Garrett? Does the rebuild have a manual adjustment on the wastegate actuator (a threaded rod) ?
Are you getting a SES light when it falls on it's face?
Let me know...Kenny 8)
Intercooler hose not on, or bad fuel injectors...
The car has a K&N right on the turbo...The turbo was rebuilt by Garrett. Stock boost control and stock chip. The SES light light does come on. I've searched a few threads and seem to think it may be the coil pack because the car does seem like it's flooded when I hit the gas. I think that is my next move right now. Thanks for taking the time to reply.
Pete
If the SES light is coming on you need to pull the codes and let us know what they are.
Your turn! :wink: 8)
Part of it is simple, he is hitting the fuel cut due to overboosting caused by the non chipped easy breathing of the K&N.
how long has it been since you changed the plus and wires, also if you replaced your plugs with platnums that is also part of your problem.
Quote from: idbeastPart of it is simple, he is hitting the fuel cut due to overboosting caused by the non chipped easy breathing of the K&N.
how long has it been since you changed the plus and wires, also if you replaced your plugs with platnums that is also part of your problem.
sounds like nothing more than part of your agenda to drive Jeff M's chip sales up i'm assuming? he is clearly not hitting overboost. i say it's ignition related.
He could be.. That happened to ours before we chipped it..
But I don't think his problem is only related to that, because the car won't seem like it's flooding out when it hits overboost. You'll know when you hit overboost. :lol:
Pull your SES Code with the paper clip trick, find out what it is, and then troubleshoot from there. I'm with Josh, it sounds like an Ign. related problem.
Rolling on the throttle slow then it bogging with more input sounds like a loose charge piping connection to me. That is why I asked the other areas to make sure his intake tube was not collapsing.
Could be any number of things...but pulling the Codes will narrow things down real quick I imagine... 8)
Quote from: TurboSedanQuote from: idbeastPart of it is simple, he is hitting the fuel cut due to overboosting caused by the non chipped easy breathing of the K&N.
how long has it been since you changed the plus and wires, also if you replaced your plugs with platnums that is also part of your problem.
sounds like nothing more than part of your agenda to drive Jeff M's chip sales up i'm assuming? he is clearly not hitting overboost. i say it's ignition related.
As usual you only read 1/4 of the post, so I'll requote it:
how long has it been since you changed the plugs and wires, also if you replaced your plugs with platnums that is also part of your problem.
Also said was:
Quote from: idbeastIntercooler hose not on, or bad fuel injectors...
Things to check as said from members:
-Check all air hoses leading and coming from turbo.
-Check plugs.
-Check vacume lines from the throtle body all the way to thier destinations to map sensor, Fuel pressure regulator, HVAC controls, Canister purge, EGR.
-Check plug wires (they can become damaged internaly if pull other than by the boot.) Use ohm meter...thats the only way.
-Pull engine CODES with the PAper clip method. See what she says before moving on. Might tell you the tale of whats aching. See www.w-body.com under pulling SES codes.
-Check coil packs and even ICM if all of those check out above. (the black or wet plugs should indicate which are the trubled coils or injectors for that mater).
-IF those check out..OHM the fuel injectors. 12-14ohms. If one reads lower than 12ohms..then its bad.
-If that checks out...Grab a volt meter and check the Map sensor reading with key on run..but engine off. Shoudl be around 2.2-2.8 volts depending on your elevation. 1 or 4 volts its bad.
-If that checks out..Disconnect the EGR and remove it. IT might be stuck open. Clean carbon and reinstall. It might be leaking too much exhaust into manifold.
-If that checks out...Buy new IAT sensor and coolant sensor..hey their cheap insurance. They have to do with fueling and timming too.
-If that checks out...check your fuel pressure. SHould be around 35-45psi at idle and off boost. Weaker than that and its a clocked fuel filter or bad fuel pump.
-If that checks out..its your ECM.
IF it were running well and then just shut off on you during a Wide open run..the that would be fuel cut. This isn't so in this case.
to check the piping, take off the airbox, and go for a drive right after a heavy rain, that way theres no dust in the air
Quote from: PeteTGPI Have a 90 TGP......just rebuilt the turbo, new fuel pump, water pump, fan and fan motor, new cat, plugs and wires etc. I can ease into the gas pedal and the car will run slowly but when I push hard on the gas petal the car wants to stall and makes no power. I'm at a loss right now. Has anyone had that problem or any ideas. Thanks.......Pete
I used to have a similar problem. When at a dead stop I would mash the gas pedal the car would sound like it was going to stall. And as soon as you let off the gas the sputering went away. I think that it is possible that your fuel injectors are DIRTY not actually bad. And the more I drove my car at highway speed the cleaner the injectors got. What I actually ended up doing is pulling the injectors out and cleaning each one with throttle body clean (yes I know probably not the best way to do it but it worked).
Doesn't sound like it has anything to do with any boost-related issue, IC pipe or overboost or not. He said it's not making any power, and with the pipe off he'd basically be driving an N/A. Wouldn't be THAT slow...
Obviously, yes, it could still be vacuum related, so take a look at all vacuum lines. Maybe something came unplugged.
Either that or it sounds ignition/fuel related. Check all the plugs first, make sure the wires are in all the right places. Hey, it happens.
From there I'd check the coils. Injectors last, just because they're hardest to pull and get looked at.
Try the paper clip trick to read the codes first.
http://www.w-body.com/forum/viewtopic.php?p=102541&highlight=paper+clip#102541