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My 1991 oldsmobile eighty eight royale keeps dying when i drive it, I have replaced ing control moduel, fuel pump, mass air flow , cam shaft sensor, timing chain, plugs wires ect. do i need to keep going???

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  • Cars & Trucks Master
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With that much already invested, why give up now? How about the crank position sensor-was that replaced as well? For spark control and spark timing, the computer needs inputs from both the cam position sensor and the crank position sensor before it can know when to cut power to the coils for spark to occur.
Before proceeding any further, you should check for diagnostic trouble codes. You would need an OBD 1 type code reader or scanner for your olds. Any stored codes may help you find the problem.
You can test the ignition system by checking for spark on a spark plug wire when the engine is cranking over. Pull the plug wire off a spark plug and put in a clean spark plug into the wire. Lay the plug so the threads are touching metal on the engine somewhere. Have someone crank the engine over and watch for a spark from the spark plug. If you have a blue, snapping spark when cranking, ignition is good.
One last note: since it dies when driving, there is a possibility that you have a malfunction in the pcm-the computer.

Posted on Jan 22, 2013

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Posted on Jan 02, 2017

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SOURCE: I have a 1999 oldsmobile

fuel pressure regulator on the fuel rail is probably it or the egr valve is stuck open allowing burnt fuel to flood the intake, im leaning towards the fuel pressure regulator because the o2sensor is probably reading rich or if its reading lean then i would choose the egr valve . good luck

Posted on Aug 26, 2008

  • 151 Answers

SOURCE: car runs rough at idle

clean out ur throttle body, just follow the hose from the air filter to the throttle body. Need 2 people to do this. Don't remove the hose completely from the throttle body. Just enuff to be able to spray ur intake cleaner into the throttle body. Do this especially if its worse when the motor is hot, as this would confirm the problem.

Posted on Sep 04, 2008

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SOURCE: changed fuel pump,coil and ignighter,mass air flow,computer,relays and still wont crank

it could be yes easily

Posted on Jan 30, 2009

  • 197 Answers

SOURCE: My 95 VOlvo 850 Tubo keeps stalling on me!

It's the solinoid. It's placed alongside the distributor. A coil about 1" around, and 2" long loosen, disconect the cable and lead coming out of it, repalce, and it will run fine then.

Posted on Sep 14, 2009

Mikey108
  • 475 Answers

SOURCE: 1998 jeep wrangler P0122

ck the map sensor

Posted on Sep 16, 2009

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