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vac. tests

cbmf's Avatar
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10-23-04, 06:19 PM   #1  
vac. tests

I have a 85 s-10 that has no power. It hesitates when accelerates. I have installed a new TBS and vac. gauge reads normal

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billys68ss's Avatar

Join Date: May 2003
Posts: 1,459

10-23-04, 08:22 PM   #2  
We need more information. What engine? Miles? Other than poor acceleration what else is it doing? Or not doing?
Hope this helps ya,

cbmf's Avatar
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10-24-04, 08:04 AM   #3  
vac. leak 85 S-10

It is a
85 S-10
2.5 liter 4 cyl
recently cleaned out the tbi and the serverely plugged Egr port
replaced the tps and idle air control valve
the engine has 140k miles
idle is fine maybe alittle high
hesitates when the gas peddle is pushed (only under load)
computer reads lean mixture
vac gauges normal but drops if I push the accelerator

davo's Avatar

Join Date: Apr 2002
Posts: 2,417

10-24-04, 08:39 AM   #4  
Check the fuel pressure during the failure and also check the exhaust for a restriction ie,plugged cat conv.

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