engine stumbling & tach going crazy - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bgbchevy · 06-07-2002, 07:29 PM

When accelerating from a stop my trucks engine stutters. What could cause this

I also noticed that when this happens, my tach spikes up a few hundred rpm, (without the engine's rpm increasing)

thanks

Rabid · 06-07-2002, 07:31 PM

Check for vacume leaks around the carb and intake. Also, check your plugs and wires and depending on what kind of distributer you have I'd also check your points and timing.

BobbyK · 06-07-2002, 08:10 PM

When I 1st got my Blazer the factory tach. was a little irratic.I changed out the plug wires with some quality ones during a tune up and the tach. has been reading steady ever since.

06-07-2002, 07:29 PM	#1
bgbchevy Registered User Join Date: Aug 2001 Location: College Station, Texas Posts: 486	engine stumbling & tach going crazy When accelerating from a stop my trucks engine stutters. What could cause this I also noticed that when this happens, my tach spikes up a few hundred rpm, (without the engine's rpm increasing) thanks __________________ 1972 Chevrolet C/20 LWB, BB 402, Tach, Bedside Toolbox, Posi, Factory AC, Factory AM/FM, cruise, Dana 60

06-07-2002, 08:10 PM	#3
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,771	When I 1st got my Blazer the factory tach. was a little irratic.I changed out the plug wires with some quality ones during a tune up and the tach. has been reading steady ever since. __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE

06-07-2002, 07:31 PM	#2
Rabid Registered User Join Date: May 2001 Location: Honolulu, HI Posts: 1,237	Check for vacume leaks around the carb and intake. Also, check your plugs and wires and depending on what kind of distributer you have I'd also check your points and timing.



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