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Guys, i recently got a 4AG-E balck top 20 valve engine & tranny installed in my AE91 rolla but the engine check light keeps coming on as soon as i cross 2000 rpm and it remains on. There is'nt any flashing, it just remains on and the car loses pwr. and starts to ping at a low rpm with a/c on. I'm looking for someone who's reputable,familiar with these engines and does diagnostic checks and who will be able to fix and solve the problem so i can enjoy the full potential of this engine.

Thanks guys, any info. & advice will be greatly appreciated.

It would be wise to know what you're getting into before you take it to a mechanic. I'm not saying your mechanic is a smartman, but there are guys out there that would take advantage of the fact that you don't know your own car.

When you're done with this process outlined below, post up what you find.

Luckily you have a C.E.L., so you could start troubleshooting it yourself.

Your diagnostic port in the engine bay would be near the passenger side shock mount and look like this:


On the underside of the cover is the pinout diagram for the port, connect terminals TE1 to E1 with a short piece of wire. If the sticker with the pinout diagram isn't there, it's these two pins:


Turn the ignition on without starting and count the flashes on the C.E.L.
If there are no stored error codes, the CEL will blink twice per second without interruption.

If there are codes, it will flash once per second for the first digit, with a one second pause between the first and second digits. If there are two or more error codes, there will be a two second pause between each code group. When all the codes have been revealed, there will be a three second pause and it starts all over again.

eg. Say you have 24 and 31, the 'I" will represent the flash and the "-" will represent the pause.

II-IIII--III-I---(start over)II-IIII--III-I---

These are your error codes to look up.

Great advice "Hook"

Thanks hook for the such good advice. Have"nt gotten the time as yet to check it out because of work demands though. Are u a mechanic?? I"m looking for a good mechanic, someone who knows about these engines and who could have it sparking! I don"t mind putting the car down for a a few days to get it sorted out properly and working up to standards. Any more good advice??

I'm no mechanic.
I just hate hearing about people that go by guesswork mechanics who make them change thousands of dollars in parts over several months, instead of using the built in diagnostic feature, and fixing it much faster and without the rape.
I decided I wasn't going to join that rape club.

The scan procedure I outlined doesn't take more than a few minutes. You literally have access to the error codes in seconds...seconds...seconds.
The time you're took to type that post you could've checked it twice.

Check for error codes first.