Question about 1994 Volvo 940
It happens more in the morning and sometimes in the middle of the road it jerks until the engine stop and i need to restart and accelerate for few seconds it will ok for few days.
Need more info but sounds like a vaccumme leak or faulty fuel pressure regulater
Posted on Jun 02, 2013
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Posted on Jan 02, 2017
SOURCE: engine surging no warning lights
Same problem. It runs worse with the air conditioning running, still doesn't fix it though. Also, Volvo will tell you the transmission is "sealed" but if you take it to a transmission place they can clean it out.
Posted on Nov 07, 2009
One fuel pump may have died. Either the in-tank pump or the in-line pump which is below the left rear passenger floorboard. I would test power to in-line pump first. You can start engine and have a friend lay down by the in-line pump and listen for it to churn/buzz/hum.
Posted on May 16, 2012
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM
Posted on Aug 30, 2012
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