92 s10 blazer 4.3 starting issues - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevymotocross · 04-03-2009, 12:27 AM

My father's 92 s10 blazer with the TBI 4.3 has had a wierd starting/idle issue since we bought it. It won't start cold unless throttle is applied. It will then start but idle low. Once warmed up, it idles decent but usually throttle will still have to be applied to start it.

Here is what we have done: Fuel pressure checks out fine at 13 psi. Fuel pressure regulator and fuel filter have been replaced. TPS voltage checks have been done. Checked for vacuum leaks.

What else could be causing this? IAC? What is the procedure to check or reset the IAC?

04-03-2009, 12:27 AM	#1
chevymotocross Registered User Join Date: May 2007 Location: East Haven, CT Posts: 882	92 s10 blazer 4.3 starting issues My father's 92 s10 blazer with the TBI 4.3 has had a wierd starting/idle issue since we bought it. It won't start cold unless throttle is applied. It will then start but idle low. Once warmed up, it idles decent but usually throttle will still have to be applied to start it. Here is what we have done: Fuel pressure checks out fine at 13 psi. Fuel pressure regulator and fuel filter have been replaced. TPS voltage checks have been done. Checked for vacuum leaks. What else could be causing this? IAC? What is the procedure to check or reset the IAC? __________________ 87 Chevy 2wd SWB: 305/700r4 Dual Exhaust, K&N Filter, Injector Pod Spacer, TBI Spacer, Belltech Front Sway Bar, Corvette Servo, Western Chassis 4/6 and c-notch

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