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Username Post: truck stales at low speeds        (Topic#347508)
teddybear15 
Forum Newbie
Posts: 61
teddybear15
Age: 51
Loc: Thatcher Az
Reg: 08-25-15
10-05-17 07:04 AM - Post#2709815    

got a 1988 Chevy S 10 had a 4.3 swap to a 1988 5.7
at 30 mph driving it thru the neighborhood or even the first start of the day just idling it wants to die the comes back to life. there are no codes.. what might be the problem here.

1988 chevy S 10 4x4 had a 4.3 swap to a 1988 chevy 5.7 engine came out of a K 1500 truck 4x4


 
gchemist 
Senior Chevytalk Moderator
Posts: 24359
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
10-05-17 07:34 AM - Post#2709821    
    In response to teddybear15

Does idle ramp up then down? What is the FI system?
Temp low/high revs are good indicators of a leaking pressure regulator. A loose vacuum line. Bad timing. Dead stop on a throttle sensor.

'95 Jimmy SLT (Bought @131,814)
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
teddybear15 
Forum Newbie
Posts: 61
teddybear15
Age: 51
Loc: Thatcher Az
Reg: 08-25-15
10-05-17 08:39 AM - Post#2709827    
    In response to gchemist

Does idle ramp up then down no
it has tbi
temp it is running about 190

1988 chevy S 10 4x4 had a 4.3 swap to a 1988 chevy 5.7 engine came out of a K 1500 truck 4x4


 
gchemist 
Senior Chevytalk Moderator
Posts: 24359
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
10-05-17 02:45 PM - Post#2709857    
    In response to teddybear15

I meant temporary high/low RPM swings. Dead spot on the throttle position sensor.

'95 Jimmy SLT (Bought @131,814)
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
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