1988 Chevy Cheyenne fuel problem

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1988 Chevy Cheyenne fuel problem

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1988 Chevy Cheyenne fuel problem - 9/7/2007 3:03:45 PM

hairball

Posts: 10
Joined: 9/7/2007
Status: offline

Hello, I'm a first time poster here

and I got given to me a 1988 Chevy Cheyenne(305) with a fuel problem. I got fuel up to the throttle body but thats as far as it goes no spray from the injectors. whats the best and cheapest fix ?

< Message edited by hairball -- 9/8/2007 2:10:03 AM >

Post #: 1

RE: 1988 Chevy Cheyenne fule problem - 9/7/2007 9:13:55 PM

golfer

Posts: 610
Joined: 10/8/2006
Status: offline

Are you getting spark?

(in reply to hairball)

Post #: 2

RE: 1988 Chevy Cheyenne fule problem - 9/8/2007 2:09:05 AM

hairball

Posts: 10
Joined: 9/7/2007
Status: offline

quote:

I got fuel up to the throttle body but thats as far as it goes no spray from the injectors.

Got spark

< Message edited by hairball -- 9/8/2007 2:15:10 AM >

(in reply to golfer)

Post #: 3

RE: 1988 Chevy Cheyenne fule problem - 9/8/2007 6:12:10 AM

astroDZak

Posts: 84
Joined: 9/2/2007
Status: offline

Check for injector pulse with a test light at the clip on for the injector during cranking. If there is none my bet would be on the ECM needing replaced. Check your ECM fuses first.

(in reply to hairball)

Post #: 4

RE: 1988 Chevy Cheyenne fule problem - 9/9/2007 5:19:52 AM

hairball

Posts: 10
Joined: 9/7/2007
Status: offline

OK, the fuel problem was the throttle body, So I purchase a replacement from Holley (670 CFM).

I'm also getting code 22 TPS circuit (signal voltage low)
Haynes says

quote:

Check for sticking or misadjusted TPS. Check all wiring and connections at the TBS and at the PCM.Replace TPS

TPS is new, all connection look good, but I will go over it again. I'm not sure but I think my 1988 doesn't have a PCM.?.

< Message edited by hairball -- 9/9/2007 6:28:57 AM >

(in reply to astroDZak)

Post #: 5

RE: 1988 Chevy Cheyenne fule problem - 9/11/2007 4:09:29 AM

hairball

Posts: 10
Joined: 9/7/2007
Status: offline

a local garage put the motor and distributor in and new throttle body on but they told me the throttle body was the wrong one for that engine so they put the old one back on, and then it didn't start...

so, I put the new throttle body back on and it started but I can't seem to get the idle down its real high ...