supersc30

It's a 93 sc300 with the ge engine. Let's start I bought the car dude said fuel ecu was out and had a new one in the back seat I just had to plug it in. The car idles fine and in park and can Rev it up no problem but when you go to drive it and go to push down the gas even if you push it to the floor the car takes forever to accelerate. Like its pulling a boat behind it. So did the cap and rotor, plugs and wires and put in the new fuel ecu in the car but the same thing. I've tried looking everywhere on forums but can't find anything. Oh and did a compression test and everything was okay

RXRodger

iTrader: (2)

Timing? ECU been serviced with new capacitors?

supersc30

I guess I need to check and haven't checked timing because it idles fine and revs just fine in park but you put it in drive and bamm your pulling a boat. How would I check them? Or easier to buy a new ecu?

supersc30

Also smells like it's running rich.

KahnBB6

iTrader: (5)

Hard to say without more details. And what is the mileage on the car?

Since you've replaced the fuel ECU, cap, rotor, plugs, wires (I assume all f that), some guesses are a the TPS sensor not being aligned correctly or possibly failing... or failing FPR.

^^ And definitely check that the engine timing is in spec, yes. On 1992-1997 2JZ-GE's (no VVT-i) we still use a timing gun the old fashioned way.

Before jumping to replacing those things, try diagnosing the TPS sensor as per the Lexus SC300/Supra NA TSRM and maybe try replacing your igniter if it's above 200k miles (available as OE Toyota or from a few sources aftermarket).

Also, do you know if the previous owner ever had the engine ECU serviced for worn and leaking capacitors? Generally at this age most pre-VVT-i 90's Toyota/Lexus vehicles will need this done. If you are uncertain, check your ECU for any reman labeling. If there is none, consider sending it in for repair. We recommend Tanin Auto for this.

Several properly working components contribute to proper 2JZ engine health so it may be more than one thing you are noticing, however usually there is a main culprit for problems that arise. Since it's a new-to-you vehicle without much known service history you will have to go through things bit by bit as you can.

Also, after an extremely long time it is also possible for the original fuel pump to wear out. It can take 20-25 years. I would only look into this as a possibility after checking into all of your engine electronics. The OE Denso kit (#950-0109) is not expensive new on the aftermarket if you do find out you need it.

BlackIRON

is the car slowly accelerating or are the revs going high and still nothing?

supersc30

Slowly accelerating even with the gas pedal shoved down its just so slow to accelerate

BlackIRON

I would check the ECU capacitors for leaks. have you tried maybe pulling the EFI fuse out for abit? like kahn said it could also be a TPS issue you should prolly check and clean those and also the IACV too.

supersc30

Got around to pulling the ecu finally and god damn every single capacitor blew and leaked on and threw the circuit board so guess new ecu and see if that fixes anything...

zneubauer

iTrader: (2)

any updates on this?

supersc30

Ecu was gone had 6 blown capacitors