Quadrajet running rich. Idles good and steady. Jul 12, 2016
Quadrajet running rich. Idles good and steady. Jul 12, 2016
- Quadrajet running rich. Idles good and steady. Jul 12, 2016 · C3 General - Q-Jet running very rich. M. When they sit for long periods with ethanol fuel, plunger will stick and run rich. - I'm working on my deceased brother's 72 350/200/4-speed, all stock, for his widow. It's been sitting for six years but with a new battery and prime, started right up. I bought a new q-jet ,a nd can't remember which way to turn the screws to make it leaner. I know the carb is not adjusted right. I put a known good quadrajet from a Chevy 305 onto the 318 and it responded like a proper carb should. Feb 12, 2024 · The Quadrajet on our '71 big block GMC is running rich. Here's a few things I've observed during troubleshooting. Joined Jun 19, 2010 · 4,236 Learn how to diagnose and fix flooding issues in your Quadrajet carburetor. I was on 74 May 17, 2020 · The last one to rebuild the carb had jumped up 2 main jet sizes because they said that the 1978 quadrajet ran lean right out of the box for emission reasons, I had told them the car was running hot so figured that maybe it was running too lean so they made the choice to jump 2 jet sizes. The choke is fully open. 1 2. . In contrast, if a stiff spring has been installed, the piston will never seat, and the carb will be running in a full-rich condition even at idle. Results in: Mild to severe flooding and rich-running conditions. Also make sure the car is fully warmed up and not running with the choke involved. Discover how to adjust the Quadrajet carburetor to achieve the right balance. 5 Lean or Rich Air-Fuel Mixture. Aug 19, 2006 · C3 Tech/Performance - Quadrajet runs rich - Real quick guys. May 9, 2018 · Re: Ruggles Rebuilt Running Rich In Start Up « Reply #14 on: May 21, 2018, 08:57:18 AM » Still having an issue with rich starts and getting the high idle to kick down. how do i fix this? angine is running way too rich. Comments: It doesn’t take much to cause enough damage to a needle/seat assembly to make it leak: A piece of Jun 19, 2010 · Quadrajet running rich at idle. I have a 1979 Corvette with a Quadrajet carb. Before I start, my knowledge about carbs is limited (but I'm trying to learn) so please forgive me ahead of time. If your running rich the first thought would be to turn the mixture screws in to cut fuel. Poor idle. I have seen many with plunger stuck up. I appreciate all the advice I've received so far and am improving the way it runs but it is still way too rich. Mar 13, 2022 · The motor is running so rich that it's fouling it's plugs with thick, black soot. 305 merc with a NEW quadrajet 4 barrel. 6 Choke Problems. 2. I also changed the gaskets in the carb. Tags quadrajet running rich at idle. Jump to Latest 21 - 29 of 29 Posts. In this video I show you what to check if you have a Quadrajet that is flooding or running rich. Sep 30, 2005 · Also, Try closing the Primary throttle plates (Goal is completely closed), while opening up the Idle mixture screws to maintian the IDLE. He was the second owner since 1980. A proper air-fuel mixture is essential for optimal engine performance. Took it out and when you get on it it bogs way down. Cliff Ruggles rebuilt it for us so the carb is basically new. Jul 29, 2015 · I am working on adjusting a quadrajet on the 1972 402 chevy engine that I recently acquired. Mar 2, 2011 · quadrajet running way rich. - I'm 400% certain it's not a vacuum leak on the motor side, nor is it a timing issue. Hard to hot-start. Sep 15, 2016 · Hey guys, I posted this on the Corvetteforum as well but haven't yet found a solution. I just finished a top end rebuild (Brodix IK200 heads, Performer RPM intake, Lunati 268 Cam) on the SBC 350. Anyways it's starting and running great but I think it's too rich. My shop and my clothes have that rich exhaust stink and the new exhaust has black build up at the tailpipes. 8 AFR at idle. MouseFink · Registered. Feb 6, 2007 · I've had it running several times to get it up to running temp and check it over for leaks and can't drive it yet except to move it in and out of the shop. If it's running rich off idle, check metering rod plunger and spring. Jun 10, 2014 · As the title says, the Q-jet is suddenly running WAY too rich for no apparent reason. Here's a look inside a Quadrajet showing the float and needle/seat assembly, which are the most common sources of flooding or running rich. I am tired of messing with carburetors, so should I shoot the Q-jet and install the Edelbrock 1405 I have rebuilt and sitting on my shelf ? Oct 19, 2013 · The Quadrajet on our '71 big block GMC is running rich. Now if i have the spark arrester and hatch off it gets goin a little better as its getting more air. Idle mixture screws will be non-responsive. It is a 75-78 qujet. I put a wideband on the exhaust and it shows the engine is running at about 12. Jun 12, 2018 · A cut, or soft, spring will keep the power piston seated in the full lean position during part-throttle power, resulting in a sag and poor throttle “feel” during part-throttle acceleration. If you're running rich then adding air should make it run better. Choke issues can affect cold starting and engine warm-up. Only Q-Jet fudge factor left would be the Pri Plunger Spring: Tall&stiff runs eye-stinging rich while Short&soft runs lean (many other factors come into play in the choice of Pri Plunger Spring : small/big cam, desired off-idle response, Part-Throttle Pulling a vacuum hose off will introduce more air to the system. Dec 22, 2018 · Here's my 2 cents, I have built probably 100 Q jets, if it's running rich at idle, check float, float level, main well plugs. kda snci hbprrrgl hsh ncp uia cueu ekoy mgawf kht