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RICKANDBOYS, Auto Mechanic
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94 GMC SONOMA: WONT..RPMS..THE CONVERTER, FUEL PUMP AND FILTER

Customer Question

I HAVE A 94 GMC SONOMA THAT HAS LACK OF POWER. IT WON'T GO OVER 2200 RPMS AND FALLS ON IT FACE IF YOU GIVE IT GAS.. IT WAS RUNNING RICH SO I REPLACED THE CONVERTER, FUEL PUMP AND FILTER. IT ALSO HAS A ROARING NOISE THAT SOUNDS LIKE IT COMES FROM DISTRIBUTOR AREA. I PULLED IT OUT AND REINSTALLED IT AND IT RAN ON ALL CYLINDERS BUT THE NOISE AND LACK OF POWER CAME BACK AFTER ONLY DRIVING IT 5-10 MILES.. ANY SOLUTIONS? NEED HELP PLEASE
Submitted: 11 years ago.
Category: Car
Expert:  RICKANDBOYS replied 11 years ago.
You say it was running rich. If this is because the plugs were dark on one side then you have "detonation" going on, bad Knock sensors are usualy to blame for not telling the distributor to back off the timing. How did the distributor gear look when you pulled it out? I have seen 350's that had a bad "cam line-bore" from the factory and chewed up the distributor gear after 100K or less. Is the "check engine" light on? Think of what all the symptoms are and reply with as much more info as you can.
Expert:  bestservices replied 11 years ago.
If it was running rich you should have replaced the O2 sensor as well. As far as the roar and lack of power i would suspect that the bushings in the distributor are worn out. This would accont for the roar and would allow the dist. to wobble and vary the timing. (have seen this before on early 90's 4.3)
Expert:  jon_050 replied 11 years ago.
If the distributor is making noise replace it!

If you don't want to buy a new one you can shop here-

http://car-part.com
Expert:  RICKANDBOYS replied 11 years ago.
Bestservice is leading you in the right direction. It would help everyone to know what codes the computer is spitting out?
Customer: replied 11 years ago.
R   sponse to RICKANDBOYS's Post: NO ENGINE CODES also replaced dist. today and the noise seems to have gone away. going to test drive more tomorrow and retime it to see if everything has gone away. thanks for info..

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