WEAK INJECTOR PULSE

1994 Mercedes Benz SL600

Tiny

2CarPros-Archives

November, 22, 2010 AT 5:54 PM

I have a 1994 SL600 and it has a very weak injector pulse at the left bank. Already swapped computers, module, crank sensor and cam sensor. Nothing has helped so far. Any suggestions? Thanks.

FOUND 1645 RELATED QUESTIONS

Cam Sensor

72 ANSWERS
2 IMAGES

1 Answer

Tiny

2CarPros-Archives

November, 22, 2010 AT 5:56 PM

1994 had a uses a 120 engine. Real good strong engine. Not sure what codes you have but these is a few thing I can think of. First make sure BOTH crankshaft sensors are putting out the SAME voltage. If you use a dual trace scope this is a easy read because you can take a trace. The cam sensors, they need to work however they have no direct effect on injector pulse other than if there is no cam signal the control unit creates one (lower output). Check engine light on? You also do not provide the miles this would help. High mile car I would suggest checking the intake gaskets. Please remember this, the intake on the left side of the engine feeds the engine on the right side. Taking a wild guess here I think you may have something that is influencing your mixture (example, stuck purge valve) creating a lean mixture. A read out of the adaptations would help if you can get them.

Please login or register to post a reply.

Code Read Retrieval/Clear Scion XD
Code Read Retrieval/Clear Mercedes-Benz C230
Code Read Retrieval/Clear Chevrolet Camaro
Code Read Retrieval/Clear - Dodge Stratus
Code Read Retrieval/Clear Mercedes Benz
Code Read Retrieval/Clear