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View Full Version : Gas and the hunka chunka, new info



90ToyAllTrac
01-09-2016, 08:53 PM
Ive posted several times about how my All Trac at random will shudder and the CEL will go on, then off. Only does it while driving not idling. I started putting premium in it and hardly does it at all now but only street driving and a bit on highway only under 70 mph. So besides O2 sensor is there anything else to check? Im betting the USDM sensors on the car dont like the output from the JDM engine.

METDeath
01-10-2016, 04:23 AM
Did you perhaps miss the part on the gas tank door that says "PREMIUM ONLY" ?

90ToyAllTrac
01-10-2016, 06:11 PM
Did you perhaps miss the part on the gas tank door that says "PREMIUM ONLY" ?

If thats true then yes I did. But its all premium now and still goes kachunk at lower speeds.

The Captain
01-11-2016, 01:28 AM
Do you have a US or JDM ECU?

Nitro_Alltrac
01-22-2016, 06:51 PM
I ran my JDM engine on the USDM ECU for several years without probably. If you weren't running premium before that could have been a big part of the problem them.

Have you checked the timing and such to make sure you don't have too much advance and it's still detonating a little?