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 Post subject: help!
PostPosted: Mon Apr 22, 2024 6:16 pm 
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Joined: Mon Apr 22, 2024 4:50 pm
Posts: 2
Year and Trim: 1990 pontiac bonneville
I am Ron, new member. please help me with my 1990 bonneville, inherited. Running rough.....134,000. A little sign of gas in the throttle body. new ignition module and plugs. plugs turned black with carbon and wants to die. Any ideas?.....Thanks!


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 Post subject: Re: help!
PostPosted: Mon Apr 22, 2024 9:48 pm 
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Joined: Mon May 19, 2008 7:01 pm
Posts: 17037
Location: Central Illinois
Year and Trim: 1992 SSE
2009 G8 GT
Gas in the intake? Probably a failed fuel pressure regulator. Pull the vacuum line off it and see if there is gas in it. There shouldn't be. If there is, replace it ASAP. That fuel can cause a big backfire and break things and set off a fire.

https://www.rockauto.com/en/catalog/pon ... lator,6124

It could also be a leaky injector. Is one spark plug more fouled than the rest?

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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights


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 Post subject: Re: help!
PostPosted: Thu Apr 25, 2024 11:37 pm 
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Joined: Mon Apr 22, 2024 4:50 pm
Posts: 2
Year and Trim: 1990 pontiac bonneville
Would anyone be interested in buying my 1990 bonneville.Trying to find time in my schedule. 134,000 miles,inherited. It ran perfect before sitting for a year, and idles rough. It couldnt be anything bad. Email me for more info and a pic....ronald.cochran2236@gmail.com


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