Hophead

I mentioned this in my other thread - but since I have got no replies I thought I would post it up on its own- the swap is complete as of last week it fired up but runs really rough. I don't have an OBD connector yet so I can't pull codes. If the mass air flow meter is disconnected the motor starts and runs much smoother? I checked the mass air flow as per the FSM and it checks out. I am in the proccess of checking othe input signals to the ECM but I don't really know where to start. Anyone have any advice? What are the basic signals teh computer checks to run? I would assume Cam/crank sensors for timing, MAF for air volume/density, throttle position and........? I was really hoping this would have fired up and ran smooth, not my luck I guess.

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1992 4Runner -33x12.5 BFG AT's - 3.4 Swapped

thefatkid

Do you have the correct airflow meter? The wrong year airflow meter will cause the condition you describe. Airflow meters need to be 96-98 or 99 and newer. Make sure they match the year of the ECU.

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90 4runner built to crawl the malls, spinnin dubs

RobD

I would also check your grounds, including the ground for your igniter. Make sure it is good and clean under the bolt that you presumably attached to the passenger side fender.

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1991 4Runner, 3.4 5VZFE swap, OME shocks/springs, 33" BFG All Terrain T/A KOs, Pioneer head unit, Infinity speakers, XM Satellite radio

Hophead

Thanks for the replies - Everything came from the same truck -'99 Tacoma 5spd- I have checked grounds. I even ran a separate ground to the ignitor from the block as recommended in many threads here. I don't think there is much more I can do without hooking up the OBD port and pulling codes.... so close and yet so far....

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1992 4Runner -33x12.5 BFG AT's - 3.4 Swapped

RobD

Oh, give the vacuum lines a good checking, too. Spray them with carb cleaner (gives a temporary seal) and see if the idle smooths out.

Mine ran a bit odd until I found a split hose.

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1991 4Runner, 3.4 5VZFE swap, OME shocks/springs, 33" BFG All Terrain T/A KOs, Pioneer head unit, Infinity speakers, XM Satellite radio

Hophead

Now I am really needin' help... got my OBD port wired up and borrowed a reader - code read error- checked out the pins on the OBD port - I have 11volts at the data link wire???? It should be 'pulse generation'.- i would assume this means fluctuating betwen 0- 12v- mine is a constant 11v. AS mentioned in the earlier post- if I unplug the MAF it smoothes out.

Anyone?

Pretty please.

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1992 4Runner -33x12.5 BFG AT's - 3.4 Swapped