Quote:
Originally Posted by ToronadoGuyDenver
Yes, I did just bolt the carburator on, but then took it in to have it adjusted by someone whom I thought knew their job. Therein lies the dilema. I've taken it in twice to two different supposed carb specialists and they've done nothing to improve the problem. So I guess that's what I'm getting at is, I'm tired of paying people to not fix the problem. I wouldn't mind paying if they did it right.
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This is why I do all my own work.
Unfortunately this electronic Qjet was built right on the ragged edge of passing emissions. It uses a host of vacuum and electronic sensors and actuators, all driven by a computer with a late 1970s processor. There's a reason why this was the last carbureted engine built in the US and the last one was made over 17 years ago, so good luck finding mechanic who understands them. The engine is extremely sensitive to the proper functioning and adjustment of all the various sensors. It's doubtful (but not impossible) for the computer to go bad. More likely it's a sensor feeding it bad data. It is also possible that one of the many, many electrical connectors has become corroded or a wire has broken or chafed through. It's a major pain to check some of these things.
The bottom line is that you must set the idle mixture screws using a dwell meter on the green test connector. Shoot for 30 degrees. You must ensure that the O2 sensor is functioning properly and is not contaminated. You must set the idle speed per the procedure in the manual then adjust the TPS with the throttle at this idle position.