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More info + Theorizing (long) 200

uid 13809's pic
posted by  Alex Z on  Thu Mar 27 17:15 CST 2003
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last visit: Thu Oct 3 04:30 CST 2013
[RELATED]

I'd just like to point out that your 900 does and Smitty's might have LH-Jet 2.4... and make for a bad comparison. I think it's a bit suspicious for a TPS to fail so early.

My thoughts: check your fuel injectors and AMM. The 3.1 TPS is not a switch in the way that all the previous ones are (one sto for idle, and one for WOT on the later ones). It's a throttle position sensor. So instead of two switches (for each extreme), it's a
potentiometer.

If your AMM and O2 sensor are okay, your TPS shouldn't adversely impact the mixture (you've still got a mechanical throttle after all).

However, shot vacuum hoses would surely let enough unmetered air in to create a rough idle and perhaps some pinging. If your car runs differently depending on the plugs, I'd wonder about how the rest of the ignition system is doing (cap, rotor, wires).

- alex






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