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95 Buick Regal Custom 3.8L cranks but will not start


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coastalcannon
Novice
coastalcannon profile image

Apr 14, 2015, 10:50 AM

Post #1 of 8 (912 views)
95 Buick Regal Custom 3.8L cranks but will not start Sign In

I had to replace a water pump that came apart violently while driving at hwy speeds. Had the car towed to my residence where I replaced the pump and serpentine belt. The car which has never failed to start, or stall, or even shut off, will not start. I have narrowed it down to spark. Checked all connectors to and from the coil, everything looks correct. haven't checked the crank position sensor for fear of doing all that work to no result. The car is in my yard and was wondering how to run down this non starting situation? Any help very much appreciated, thanks


nickwarner
Veteran / Moderator
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Apr 14, 2015, 11:09 AM

Post #2 of 8 (907 views)
Re: 95 Buick Regal Custom 3.8L cranks but will not start Sign In

Look at the wiring for the crank sensor. Its down behind the harmonic balancer. With the pump coming apart like you said I'm betting something snagged your wiring and beat it up. Do you have injector pulse (quick test with a noid light). No signal from the CKP will shut down spark and injector pulse.


coastalcannon
Novice
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Apr 14, 2015, 11:32 AM

Post #3 of 8 (899 views)
Re: 95 Buick Regal Custom 3.8L cranks but will not start Sign In

I am getting good injector pulse/fuel pressure. It looks as though the wiring above the water pump may have been cooked, high heat etc. The plastic ribbed shroud surrounding the wires have crumbled away and seems there is some damage to the wires that come from coil and have connections for cam sensor crank sensor etc. Is there a name for this so maybe I can just replace damaged wires with a new harness? Thanks


coastalcannon
Novice
coastalcannon profile image

Apr 14, 2015, 11:37 AM

Post #4 of 8 (898 views)
Re: 95 Buick Regal Custom 3.8L cranks but will not start Sign In

Correction, getting good fuel pressure to the rail, didn't check for pulse. But these burnt wires really seem to me to be a major. So as for the above...if it is feasible to get a new harness and just replace all of that would set my mind at ease even if I have to replace the cks too. thanks


Tom Greenleaf
Ultimate Carjunky / Moderator
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Apr 14, 2015, 12:14 PM

Post #5 of 8 (892 views)
Re: 95 Buick Regal Custom 3.8L cranks but will not start Sign In

Nick should be by soon. If you see damaged wires even if not the exact problem I would try to find exact plug and wires color for color + position w plug. 20 model years my bet is only used and sometimes (here) shocked to find some stuff in great shape but car (junked) a total mess otherwise. That's if you have a "get your own" type junkyard.


I would painstakingly solder wire by wire and shrink wrap plus "Liquid Electrical Tape" over that and back into those wiring holder snake things either used when there or those available new as generic.


Check for new but really doubt it,


T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Apr 14, 2015, 5:00 PM

Post #6 of 8 (880 views)
Re: 95 Buick Regal Custom 3.8L cranks but will not start Sign In

You need to do some more testing.

Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



coastalcannon
Novice
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Apr 28, 2015, 5:59 AM

Post #7 of 8 (838 views)
Re: 95 Buick Regal Custom 3.8L cranks but will not start Sign In

Okay, Finally got back to it yesterday, busy work schedule. rewired burnt wires replaced the crank position sensor, fired up like new. There was no spark or injector action, the noid light and all of the suggestions really helped out. Put some time in with the wiring, but about 20 minutes replacing the cks. Didn't cost a lot and didn't take much time for the repair. The car runs great and all seems well with the fix Thanks again for all of your help and will definitely recommend and applaud your site to friends. This site is an invaluable resource and eased my mind when I was just about to scrap an older but very nice running vehicle.


nickwarner
Veteran / Moderator
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Apr 28, 2015, 7:53 AM

Post #8 of 8 (834 views)
Re: 95 Buick Regal Custom 3.8L cranks but will not start Sign In

Bit late getting back to you, glad you got this fixed. Did you put the wires back into some split loom to protect them? You can buy split loom at most parts sores, either in a container with a set length or some places will sell it by the foot. You want to keep those wires protected and secured so nothing bad happens to them.
Its an older car but they were a pretty solid built and comfortable car to drive. If kept maintained they can remain so for a very long time. Would've been a shame to see it get scrapped out for less than $100 worth of parts needed to get it running plus the financial burden of buying a replacement.






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