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06-27-2013, 06:44 PM
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#1 |
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Registered User
Join Date: May 2013
Location: USA
Posts: 33
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87 chevy 350 tbi HELP
my 87 truck will not start.. the tbi injectors dribble out a little fuel and sometimes it will start but will not run to long because of it is not getting fuel. i replaced the fuel injectors thinking it was them that was wrong. the left side dribbles out, the right side will not. i have even rebuilt the tbi thinking it needed some cleaning.. same thing happens though. what could be my problem? also, the engine in the 87 was replaced with a 93 i think. not to sure on what year the engine that is in it is or what it came out of.any help is greatly appreciated.
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06-27-2013, 07:00 PM
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#2 |
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Registered User
Join Date: Oct 2003
Location: OC CA
Posts: 1,374
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Re: 87 chevy 350 tbi HELP
Check Fuel pressure - sounds like fuel pump is done for. Also check your fuel filter. Normal fuel pressure range for TBI is 9 to 13 PSI for stock applications.
//RF
__________________
"The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29)  New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17) |
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06-27-2013, 07:10 PM
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#3 |
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Registered User
Join Date: May 2013
Location: USA
Posts: 33
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Re: 87 chevy 350 tbi HELP
Alright i will do that tonight. The truck ran fine for about 5-10 miles and then just wouldnt start.
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06-27-2013, 07:11 PM
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#4 |
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Registered User
Join Date: May 2013
Location: USA
Posts: 33
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Re: 87 chevy 350 tbi HELP
Sorry to have to ask, but how would i go about checking the fuel pressure?
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06-27-2013, 09:11 PM
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#5 |
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Registered User
Join Date: Mar 2013
Location: Fayetteville Arkansas
Posts: 830
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Re: 87 chevy 350 tbi HELP
Did the truck quit or did this happen right after you put the other engine in?
To check the fuel pressure you need an adapter. I would try a few simple things first. A few questions: Is the check engine light on? If so you need to get the codes. Will it start if you pour a little fuel into the TBI? Also you can have someone turn the key ,not to start, while you hold your hand near the top of the gas tank and see if you can feel and hear the pump come on for a few seconds, if so fuel pump is most likely ok. The fuel pressure switch could be bad, the fuel relay switch could be bad, or the dizzy module (it runs both fuel and spark on the tbi). If you pour a little gas in the TBI and it starts and you also feel that the fuel pump is not working when the key is turn on it is most likely the fuel pump, if not you need to check elsewhere.
__________________
Scott 87 Chevy 2WD SWB, 88 4x4 LWB http://67-72chevytrucks.com/vboard/s...d.php?t=610652 |
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06-27-2013, 09:29 PM
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#6 |
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Registered User
Join Date: May 2013
Location: USA
Posts: 33
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Re: 87 chevy 350 tbi HELP
It will start if your pour gas in the thi. But very shortly. I can hear a noise that i want to say is the fuel pump. Its more of an buzz humm noise. I will try that a little later. Anything else i should try?
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06-27-2013, 09:31 PM
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#7 |
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Registered User
Join Date: May 2013
Location: USA
Posts: 33
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Re: 87 chevy 350 tbi HELP
The truck quit. The engine was replaced long ago. Probly more than 3-4 years ago. And not by me. The owner before the owner i bought it from did it i think
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07-03-2013, 08:45 AM
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#8 |
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Registered User
Join Date: May 2013
Location: USA
Posts: 33
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Re: 87 chevy 350 tbi HELP
Dropped the tank. Replaced fuel pump. Works like it did Before. Fuel pump was clogged up and wasnt at normal pressure.
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