Strange Starting '76 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bluec10 · 11-25-2003, 12:48 AM

It's getting colder up here in Manitoba, but my fearless '76 hasn't let me down yet!

I has this weird starting sequence though... I pump the pedal a few times and it cranks over without too much trouble. I let it idle long enough to warm it up a bit, then I put it into drive. As soon as I take my foot off the brake it stalls.

It starts up again without any problem. I put it in drive and the second time it just drives away without any problem.

It does this consistently - stalling the first time but going the second time I put it into drive. What gives???

Frank-id · 11-25-2003, 02:57 AM

It seems a few adjustments are needed.
My suggestions would be.....while engine is cold, adjust choke bimetel spring that the choke blade is a little tighter. Spring is in black choke housing. Also adjust the choke linkage to make the hi idle screw hold the throttle poen a little longer. If ya set the hi idle screw for about 1100 RPM at the highest and the hot idle for about 650RPM in drive, all will be well.

11-25-2003, 12:48 AM	#1
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	Strange Starting '76 It's getting colder up here in Manitoba, but my fearless '76 hasn't let me down yet! I has this weird starting sequence though... I pump the pedal a few times and it cranks over without too much trouble. I let it idle long enough to warm it up a bit, then I put it into drive. As soon as I take my foot off the brake it stalls. It starts up again without any problem. I put it in drive and the second time it just drives away without any problem. It does this consistently - stalling the first time but going the second time I put it into drive. What gives??? __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.

11-25-2003, 02:57 AM	#2
Frank-id Registered User Join Date: Sep 2003 Location: Twin Falls, Idaho Posts: 73	Cold starts It seems a few adjustments are needed. My suggestions would be.....while engine is cold, adjust choke bimetel spring that the choke blade is a little tighter. Spring is in black choke housing. Also adjust the choke linkage to make the hi idle screw hold the throttle poen a little longer. If ya set the hi idle screw for about 1100 RPM at the highest and the hot idle for about 650RPM in drive, all will be well. __________________ Chevy stepper 400sb 350 turbo

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