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3.1 TPS and running issues 200 1991

Half price sale at the local PnP today, got an early start, but old faithful 91 245 had other plans. This is a stick shift, non CA car with 3.1. Car fired normally, but only ran for a second and died. Would not restart and smelled badly flooded. We took other motive means. Upon returning hours later, car would still not start. Finally I cranked it with the pumps disconnected and then the car started but ran terribly. I began to go through all the usual culprits but found only the climate control hose on the tiny tubing elbow cracked, nothing else. Good spark etc. Unconvinced, I repaired the hose...and the bloody thing fired right up after about ten revs. Prodigious black smoke, but then it smoothed out and idled fine. I still had a major misfire off idle though. Car threw code 121 this morning, but that is gone now. This is not really an AMM and the plug is clean. Seems fine now, but I've found that the throttle position switch is not as it should be. I seem to recall reading someplace that terminals 1 and 2 should be 1200 ohms and should rise to something when the switch is rotated--3000 ohms? 2500 ohms? Instead this one reads 2000 ohms always. Terminals 2 & 3 give me 2750. If my recollection is correct about terms 1 & 2, sounds like I need to replace this little guy. What say bricksters? I'm so used to 2.2/2.4, and admit I've done little with this 3.1 car even after nearly 3 years and 100k miles other than just maintenance. Never had an injection worry.

Thx,

Dave






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New 3.1 TPS and running issues [200][1991]
posted by  David Samuels subscriber  on Sat Sep 22 07:34 CST 2007 >


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