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bigblock73 · 05-23-2003, 07:19 PM

Well, I picked up the 77 Blazer last night...seemed as if I had to wait forever!

I am very pleased with it but noticed one thing on the way home. I decided to see if it had any oompth so I got on it pretty hard from a standing stop...it accelerated fine but right before the 2-3 shift it sputtered and felt like it wanted to stall. I immediately got off the throttle and it did not stall, but it shouldn't be doing this. I am going to be changing the cap and rotor and check the plugs but i am not sure if this will be the solution.

What do you guys and gals think it is?

Also, it doesn't smell like it is running rich, but when you de-accelerate from above 40-50 MPH or so (or downshift manually) it "crackles" thru the exhaust...sounds cool don't get me wrong, but could the carb be out of tune or running ruch and expelling the excess that way?

...Jeff

Grim Reaper · 05-23-2003, 09:14 PM

It's running out of gas it sounds like. Throw a fuel filter in it as see if it goes away. Clooged filter will restrict the flow into the float bowl and it will actually run out of gas till you get off it and it catches back up.
As for the back fire....check for any vacuum leaks.. A quad has a floating set of metering rods. The mains are not mechanicly controled the are totaly controlled by vacuum. When you give it gas the vacuum drops and the rods rise. When you get off the throttle the sudden vacuum sucks them closed. Vacuum leaks on the carb can cause this to be delayed. Lazy spring on the top doors for the secondaries will also cause issues.

Mike76251 · 05-23-2003, 10:53 PM

I second the fuel filter and I would look at the fuel pump too.

**swervin ervin** · 05-23-2003, 11:06 PM

I agree, fuel filter, or possibly fuel pump. Either way, it sounds like it's running out of gas to me.

**old Rusty C10** · 05-24-2003, 09:34 AM

fuel filter fuel pump kinky gas line or even crap on the screen in the tank

solidaxel · 05-24-2003, 07:11 PM

Work on fule delevery first

Russell · 05-24-2003, 07:33 PM

Hmmm... This gives me an idea for why my toyota may be dieing out all the time when it gets going over 40 km/h...

bigblock73 · 05-25-2003, 01:16 AM

Thanks for the help guys...I don't know what I was thinking and why I didn't think of that right away...must be the 4cyl/fuel injection/Ranger driving brain fart! Maaan I miss driving a carb'd V8...been almost three years since Yeller has seen the road.

I bought a new fuel filter today, will put it on tomorrow. If that doesn't solve the problem I will put on my Carter fuel pump that was on the 355 that WAS in Yeller... know that works fine.

I'll keep you updated.

Once again...thanks!

...Jeff

05-23-2003, 07:19 PM	#1
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,826	new truck bugs :) Well, I picked up the 77 Blazer last night...seemed as if I had to wait forever! I am very pleased with it but noticed one thing on the way home. I decided to see if it had any oompth so I got on it pretty hard from a standing stop...it accelerated fine but right before the 2-3 shift it sputtered and felt like it wanted to stall. I immediately got off the throttle and it did not stall, but it shouldn't be doing this. I am going to be changing the cap and rotor and check the plugs but i am not sure if this will be the solution. What do you guys and gals think it is? Also, it doesn't smell like it is running rich, but when you de-accelerate from above 40-50 MPH or so (or downshift manually) it "crackles" thru the exhaust...sounds cool don't get me wrong, but could the carb be out of tune or running ruch and expelling the excess that way? ...Jeff

05-23-2003, 09:14 PM	#2
Grim Reaper Registered User Join Date: Jul 2001 Location: Atlanta GA Posts: 1,704	It's running out of gas it sounds like. Throw a fuel filter in it as see if it goes away. Clooged filter will restrict the flow into the float bowl and it will actually run out of gas till you get off it and it catches back up. As for the back fire....check for any vacuum leaks.. A quad has a floating set of metering rods. The mains are not mechanicly controled the are totaly controlled by vacuum. When you give it gas the vacuum drops and the rods rise. When you get off the throttle the sudden vacuum sucks them closed. Vacuum leaks on the carb can cause this to be delayed. Lazy spring on the top doors for the secondaries will also cause issues. __________________ Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project

05-23-2003, 11:06 PM	#4
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	I agree, fuel filter, or possibly fuel pump. Either way, it sounds like it's running out of gas to me. __________________ Mike 1985 Chevy C-10

05-24-2003, 09:34 AM	#5
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,300	fuel filter fuel pump kinky gas line or even crap on the screen in the tank __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

05-24-2003, 07:11 PM	#6
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Work on fule delevery first __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

05-23-2003, 10:53 PM	#3
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,500	I second the fuel filter and I would look at the fuel pump too.

05-24-2003, 07:33 PM	#7
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Hmmm... This gives me an idea for why my toyota may be dieing out all the time when it gets going over 40 km/h... __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

05-25-2003, 01:16 AM	#8
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,826	Thanks for the help guys...I don't know what I was thinking and why I didn't think of that right away...must be the 4cyl/fuel injection/Ranger driving brain fart! Maaan I miss driving a carb'd V8...been almost three years since Yeller has seen the road. I bought a new fuel filter today, will put it on tomorrow. If that doesn't solve the problem I will put on my Carter fuel pump that was on the 355 that WAS in Yeller... know that works fine. I'll keep you updated. Once again...thanks! ...Jeff



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