Question about 1994 Buick Roadmaster

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Trouble starting need to know where the crank shaft sencor pigtail on my 94 buick roadmaster is suppose to go to. it got cut off now im having trouble locating where it is suppose to go to

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Crank shaft sencor is located midway on the rear of engine next the gear box cant miss it its the only sencor dwn there.

Posted on Jan 15, 2009

  • JIMMY MOHAN Jan 15, 2009

    CANT GET MY NISSAN ALMERA GOING.IMOBILEIZER PROBLEMS LIGHT IS CONTINUEISLY ON BUT THERE NO SPARK. CUD ANYONE TEL ME WHAT CUD B WRONG?IV REPLACED CRANK AND CAM SHAFT SENCORS AND THE WHOLE ECU BUT STIL NO GO.THE REASON THE CAR STOPPED WAS A RED/YELLOW WIRE AT BACK OF RADIO WAS CROSSED WITH A LIVE WIRE.

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Behind the main crankshaft pully you need to remove the crank bolt and use a puller to remove the pulley to get at it please rate -jeff

Posted on Sep 05, 2008

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1 Answer

94 Buick Roadmaster cut off & won't start it turns over but won't start i replace optispark and ignition core star and fuel pump still kicking do you think you would be the camshaft position sensor


First you want to know if your ignition system is working, so have you checked for spark?
If the answer is no, go to a parts store and buy a calibrated spark tester, real simple and inexpensive. Hook it up to one of your spark plug wires, crank the engine over with the key (as if you were starting it) and see if you get a strong blue spark. You will need a helper to turn the key while you watch for spark on the tester. If you have good spark, you can assume the ignition system is working good, so that's not the problem, nor is the cam sensor a problem. If you have spark and still no start, it likely is a fueling problem- see if fuel pump is turning on, check injector circuit-things to do with the fuel.
If you find no spark when cranking, something in the ignition system is the problem. Not necessarily the cam sensor- that sensor is for the computer to synchronize fuel injector timing with the intake valves opening. For the computer to determine spark timing and advance, it uses the crankshaft position sensor. So that sensor is more tied with the ignition system, and is often at fault when spark is lost. Other things, too, like the ignition control module, but those are things to check when troubleshooting the ignition. A repair manual should have a troubleshooting flow chart, or at least some steps or procedure when troubleshooting the ignition. Good luck.

Mar 10, 2017 | 1994 Buick Roadmaster

1 Answer

How do you know its the fuel relay? My 94 roadmaster starts good when first crank but when cut off and then i try to cut it on again it'll start but then cut off. Changed starter and has gas but it wont...


this is indicative of a faulty ignition switch or ignition circuit.
When you have it in the start position the power is divided between the coil and the starter motor. hence it starts
when you let the key go to the run position the power is stopped to the starter but a new circuit is opened to the coil hence providing power to the coil for the engine to keep running. There is a resistance wire to the coil that lowers the voltage for running. Your problem will be in that run circuit if not in the ignition switch

Mar 09, 2015 | 1994 Buick Roadmaster

1 Answer

My 1992 buick roadmaster cut out on me while going to lunch.it cranks but wont turn over. im not sure what it could be.any suggestions will be helpful.


Could be your fuel pump has gone bad. You need to check your fuel pressure if it is below 5-10 lbs
you will have to replace the fuel pump..first check and make sure your fuse to the pump is good before you do anything..The fuel pump is located in the fuel tank and the only way to fix it is to drain your tank and drop it it get to the pump that is located on the top side of it, the cost of the pump should be about $30-50..shop around before you buy one...takes about 2-3 hours to do this..

Mar 29, 2011 | 1992 Buick Roadmaster

1 Answer

Need to know were it is fuel cut off relay 92 buick roadmaster


If you check your owners manual or purchase a repair manual it should tell you.

Apr 26, 2010 | 1992 Buick Roadmaster

1 Answer

Which way is it suppose to be put in it confusing me on my air filter on 92 roadmaster


hi, the rubber running around the edge needs to be facing upwards so that the fins on the filter are facing down, hope you under stand that.
The fins need to be down not up so facing upwards you should have a smooth surface.

Let me know if you have problems understanding what im telling you

Jan 15, 2010 | 1992 Buick Roadmaster

1 Answer

My gas guage dont work how do i fix it?


I know EXACTLY what the problem is. You are not alone. Many Buick Roadmasters had this problem. Its in your fuel tank. The fuel bob gets stuck and even sometimes in the filter it cuts off the gas to prevent strong acceleration. This is not a cheap fix unless you do it yourself. The gas tank either needs to be removed or cut open. This is coming from a prior Buick Roadmaster driver. Call your Buick dealer, they can help you out.

I hope this helps.

Mar 31, 2009 | 1992 Buick Roadmaster

1 Answer

Need to find wiring diagram for the dash of my 94 buick roadmaster


I locked my keys in my car! 1992 buick roadmaster, can someone tell me how to jimmie it open?

Aug 12, 2008 | 1994 Buick Roadmaster

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