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Travelling or not 1993 SL1 runs very rich starting at 3500 rpm Popping roaring sounds come out of throttle body Than rpm cycles from 3500 2600 3500 resistance of TPS tests ok could map be defective?
Wiki User
∙ 16y ago
I have the same engine, same model. The timing is not being retarded. Mark your crankshaft pulley when #1 piston is at TDC on it's compression stroke. Than use a timing light, you will see that the timing mark does not retard like it should. Why? I have yet to find out. If you find out why before I do, let me know. My TPS amd MAP sensors are working just fine. posted 02/12/2008
Wiki User
∙ 16y ago
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