Need some timing carb help! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67chevemall · 11-09-2006, 08:52 AM

I can't get my truck to stop with the ping ping ping pop.....

It runs alright but won't stop detenating.

I've never did timing on it myself before and need some help as to what I am looking for on the marks when the light goes off?

I have the carb rich because I thought the real lean mix was making it ping but know I think it is the timing but I have no clue now.....

Any ideas or tricks to this?

Cheers

panhandler62 · 11-09-2006, 09:40 AM

Pinging can be caused by a number of things but the most common cause is using too much advance for the fuel grade/compression ratio you normally use.

You want to read the mark that appears on the balancer at the index mark as the strobe hits it. To the left of center is advance and to the right is retard. I don't rememebr the spec right off but I think a fairly stock motor starts about 8 to 10 degrees of initial timing. (Look that up.. it's early and I'm tired!)

Your initial timing might be ok and you still have ping. That could be caused by having too large of an advance curve built into the distributor.

**VetteVet** · 11-09-2006, 12:55 PM

http://www.chevyhiperformance.com/ho...673/index.html

Here ya go

GREASEMONKEY72 · 11-09-2006, 01:17 PM

mine is set at 8*BTDC and the dwell is set at 30* or .019 i think my dizzy is also the stock points with external coil hope that helps at all and good luck o and also i run on 89 pump gas

-steven

67chevemall · 11-12-2006, 07:27 PM

thanks for the link that is a big help!

Cheers

I get it running someday, it has only been 10 years of waiting

11-09-2006, 08:52 AM	#1
67chevemall Registered User Join Date: Apr 2003 Location: NB Posts: 3,367	Need some timing carb help! I can't get my truck to stop with the ping ping ping pop..... It runs alright but won't stop detenating. I've never did timing on it myself before and need some help as to what I am looking for on the marks when the light goes off? I have the carb rich because I thought the real lean mix was making it ping but know I think it is the timing but I have no clue now..... Any ideas or tricks to this? Cheers __________________ 1968 Chevy C10 307 3ott fleetside 1967 Chevy C/10 V8, 3spd, fleetside lwb.Sold 1967 Chev C/10 step, 383, M21. SOLD

11-09-2006, 09:40 AM	#2
panhandler62 Java Mechanic Join Date: Jun 2005 Location: Martinsburg, WV Posts: 6,763	Re: Need some timing carb help! Pinging can be caused by a number of things but the most common cause is using too much advance for the fuel grade/compression ratio you normally use. You want to read the mark that appears on the balancer at the index mark as the strobe hits it. To the left of center is advance and to the right is retard. I don't rememebr the spec right off but I think a fairly stock motor starts about 8 to 10 degrees of initial timing. (Look that up.. it's early and I'm tired!) Your initial timing might be ok and you still have ping. That could be caused by having too large of an advance curve built into the distributor. __________________ Keith 11 Lincoln MKT -- Momma's wagon 13 G37xS -- middle age crazy car 68 C20 Fleetside -- RIP Decorating the whole town up at a cost of $27 ....

11-09-2006, 12:55 PM	#3
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,719	Re: Need some timing carb help! http://www.chevyhiperformance.com/ho...673/index.html Here ya go __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

11-09-2006, 01:17 PM	#4
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: Need some timing carb help! mine is set at 8BTDC and the dwell is set at 30 or .019 i think my dizzy is also the stock points with external coil hope that helps at all and good luck o and also i run on 89 pump gas -steven __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

11-12-2006, 07:27 PM	#5
67chevemall Registered User Join Date: Apr 2003 Location: NB Posts: 3,367	Re: Need some timing carb help! thanks for the link that is a big help! Cheers I get it running someday, it has only been 10 years of waiting __________________ 1968 Chevy C10 307 3ott fleetside 1967 Chevy C/10 V8, 3spd, fleetside lwb.Sold 1967 Chev C/10 step, 383, M21. SOLD



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