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11-23-2012, 05:38 PM
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#1 |
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Registered User
Join Date: Nov 2012
Location: Boxford, Ma
Posts: 3
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TPS problems on an 87 Chevy K10
Ok so I got in my truck today, left my road and shifted into 3rd, then the whole truck started bucking. I threw it into neutral (manual trans) and it stops, so I pull over and mess with the TB and everytime I would open it up it would act as if I was feathering it. Then I started messing with the TPS and nothing happened what so ever, also I had a extra TPS so I put that on and still nothing.
A little extra info, Its a Holly 670 CFM TBI, I already replaced all the vacuum lines, also I have replaced the EGR as well. Thanks in advanced |
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11-24-2012, 01:03 PM
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#2 |
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Registered User
Join Date: Jul 2005
Location: CT
Posts: 278
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Re: TPS problems on an 87 Chevy K10
Why are you messing with the tps? First check your ignition system out and then verify your fuel pressure.
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11-24-2012, 04:58 PM
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#3 |
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Registered User
Join Date: Nov 2012
Location: Boxford, Ma
Posts: 3
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Re: TPS problems on an 87 Chevy K10
Well I replaced the whole fuel pump assembly about 8 months ago. The problem is not it missfiring on idle it runs fine but when I move the tps no extra fuel is introduced in to the tb it runs as if its still idling.
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11-24-2012, 08:05 PM
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#4 |
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Registered User
Join Date: Jul 2009
Location: Northern California
Posts: 411
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Re: TPS problems on an 87 Chevy K10
Those holley tbi units are set from the factory with the pressure reg adjusted to high check it again, also plug the egr vacume line see if its egr related.
__________________
1991 Chevy suburban 3/4 ton 4x 4:56 and pulls great 1979 Chevy 1/2 ton long bed diesel 1974 Chevy crew cab short bed 3/4 ton 4x4 project 1991 Chevy suburban 2wd 1984 Chevy suburban 3/4 ton 4x 6.5 detroit with turbo 1961 Chevy pickup 1/2 ton 2wd 1975 gmc crew cab short bed 2wd |
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11-26-2012, 04:18 AM
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#5 |
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Registered User
Join Date: Nov 2012
Location: Boxford, Ma
Posts: 3
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Re: TPS problems on an 87 Chevy K10
I need some more ideas, nothing has worked so far.
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11-30-2012, 12:20 AM
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#6 |
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Registered User
Join Date: May 2010
Location: Leeds North Dakota
Posts: 30
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Re: TPS problems on an 87 Chevy K10
My truck was just doing the same thing,and when I changed fuel filters it went away. I had changed them about 10 months back but I let one of my tanks get really low and it must have gotten plugged then. Hope that helps!
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__________________
85 k10 4" lift 454 in the works |
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