951 stalls under throttle

[Cj71788]

Hi, I have a 98 gtx limited with the 951 and just about every time you give it throttle it stalls out. Have cleaned the RAVE valves and am in the process of changing the grey tempo lines. However if you feather the throttle slowly until it reaches full speed it will run for a minute fine then stall out. Any ideas what this may be? Thanks guys

 

[Mike99]

Change all the fuel lines, clean the selector valve, clean the carbs. Don't run it until you fix your lean situation, or you will be asking for more expensive repairs.

Mike

 

[Cj71788]

What do you guys think could e causing the lean situation? Maybe the low speed mixture valve? Still smokes upon startup and it is using oil at a normal rate. Thanks

 

[pwgsx]

Dirty Carbs!!!

 

[Mike99]

True that!

 

[Cj71788]

You guys are right. Carbs were full of gray stuff. Tried to start it after I changed all the lines and put it all back together it's not sucking gas into the new lines. Any idea why? Maybe the lines need to be filled with gas because the little fuel pump bladder isn't strong enough to get te air out first? It does run if I spray starting fluid into it

 

[tkarvelis]

Do not spray carb spray in the carbs. It has no oil in it to lube the engine. Get some 40:1 gas/oil mix in a spray bottle and spray that in the carbs.

Sent from my SM-N910V using Tapatalk

 

[Cj71788]

Ok got it running. Isles smooth now but still same problem. Any ideas? Seems like it's starving for gas.

 

[Coastiejoe]

Did you clean or replace the fuel selector? Very common for the Gunk to clog it up. This causes both a lean condition and less oil to the engine.

 

[Cj71788]

Yup cleaned that too with a wire brush and flushed it out with carb cleaner. I also installed an addition fuel filter leading to the carbs and noticed half the time it gets to be almost empty along with the stock fuel filter. If I hold the choke as I rev it up a little it works fine (most of the time)

 

[mikidymac]

The fuel selectors have a rubber seal in them and they get old and leak and the carb cleaner finishes them off. Get a new one. Did you replace any of the parts inside the carbs? The fuel pump check valves get old and don't seal over time and carb cleaner can destroy them too. Still sounds like a fuel issue to me.

 

[Cj71788]

No I didn't replace anything on it besides the fuel lines and throughly cleaned all of the parts. Everything seemed to be in good shape

 

[Coastiejoe]

Bypass the selector for now to see if you can improve things. The common issues after people do the lines are, the lines on the wrong nipples at the sending unit, the pulse line not connected, the carbs were cleaned BEFORE doing the lines, then the lines were done and the user assumes the carbs are still good (which is not normally the case), the fuel selector sucking air due to carb cleaner, and or the water separator leaking air into the system. This last thing is pretty common. It does not leak fuel but does suck air. I'd bypass it for now as well..