I have a 1991 Toyota Supra, 2.5L twin turbo, 1JZ. It does not have a problem starting but when I start it up in the morning and when I give it gas it will start to stall going down to about 200-300rpm. After about a minute or two of doing this and with me trying to get the rpm's up it will blow a lot of black smoke out of the exhaust. It also does this randomly when I am stopped at lights and when I give it gas. I have already had the idle control stitch replaced, as well as the computer looked at. But no matter what I do it will not stop stalling out. Any help would be much appreciated.
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Re: 1991 Toyota Supra
Piston rings are shot and your valves need to be replaced
have you been racing this vehicle or has previous owner
if you just bought the car im sure last driver had it semi decked out now you will need a laptop the cars software to reset vehicles computer back to factory settings
when owners drive there vehicles they set them up in a way so more gas and throttle can be applied you just need to reset everything back to factory settings on comp
and if that dont work you will definatly need to do an over haul
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yes the tranny will work and you need the 1j engine mounts as they are different. the 7mgte mounts will not allow the exhaust manifold to fit with the down pipe. your intercooler will work fine although i recommend replacement since you loose pressure if this is an original unit. hope this helps. please rate.
The gauge is working fine, the turbo will not kick in untill the engine is spinning fast enough, as the turbo is propelled by exaughst from the engine. So, you can drive around normal and never use the turbo, and climb in the gas and spool the turbo up, what you are noticing is called turbo lag, which is the biggest down fall when compaired to superchargers!
Yes. However it is a very expensive swap $5000 to $8000 to do it right. You will need the 1J or 2J engine, transmission, wiring harness, ecu, and alot of other pieces to do the swap. The engine brackets will need to be modified and you will have to upgrade your brakes. This kind of swap requires a good knowledge of the Toyota Supra and the engines. I do not recommend this swap for a beginner. A cheaper way is to take a 7M-GTE and upgrade the internals and turbo.
You are going to need a repair manual for your Supra before you start. I have one in my shop right now for another problem and I took a look under the hood. I wouldn't try it without one. The manual will give you the step by step with pictures.
The intake valve guide seals are worn and are letting oil slip by under high engine vacuum--as when you let up on the gas. The only fix is to take the cylinder head off and replace the valve guide seals. This problem is pretty normal for an older car with high mileage. It will probably run just fine. Just keep checking the oil level and keep it topped up.