Having problems with your Saturn SL2 ?

Starts after rocking car,but there is a clunking after you rock it 3 or 4 times then it starts

Posted / edited by AnonymousUser on : 03-10-2022

Answers :

There can be a misfire too from the cylinders.

An engine that \015\012hesitates, stumbles or misfires when accelerating or when\015\012 it is under load is an engine that is either sucking too much air, not \015\012getting enough fuel or misfiring. If the Check Engine Light comes on,\015\012 you may find any of the following codes:

• P0171, P0174 Lean \015\012fuel condition codes
• P0120 to P0124 Throttle position sensor codes
•\015\012 P0222 to P0229 Throttle position sensor codes
• P0400 to P0409 EGR \015\012related codes

If there are no misfire codes, a common cause of \015\012acceleration stumble is a bad throttle position sensor (TPS). The TPS \015\012tells the computer how far the throttle is open. The computer uses this \015\012information to determine how much fuel is needed to maintain the correct\015\012 air/fuel mixture and when extra fuel is needed if the throttle suddenly\015\012 opens wide.

Another common cause is dirty fuel injectors. If \015\012varnish deposits have built up in the tips of the injectors, they won’t \015\012spray as much fuel as they normally do, or will “dribble” fuel instead \015\012of spraying a fine mist. This creates a lean fuel mixture and \015\012conditions that are ripe for stumble and hesitation (also misfire). Look\015\012 at short term fuel trim (STFT) and long term fuel trim (LTFT) with your\015\012 scantool.\015\012\015\012\015\012\015\012\015\012\015\012\015\012 If the numbers are high, it tells you the engine is running lean and \015\012the injectors need cleaning. Treat mild cases with a high quality \015\012fuel-injector cleaner additive. Severe cases require professional \015\012cleaning equipment.

Also if this sensors apply to your \015\012vehicle, camshaft sensor or \015\012crankshaft sensor if sensors bad you don't get any spark. Also \015\012run a scan on the car.

Good\015\012\015\012\015\012\015\012\015\012\015\012\015\012 luck and rate this solution,\015\012 please.
Repair Help & Product Troubleshooting for Saturn SL2

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