urgent Question Need Help! - SOLVED!

[Chevy305]

Ok so I rebuilt my carb today because the of me sucking in a bunch of muddy water. But, now I can't seem to get my truck to run right, it keeps detonating like crazy, and there is nothing I can do to stop it. It won't stay running unless I am on the gas. Also I retarded my timing because I thought that might be the issue but it did nothing to help. I also played with the float level and the idle screws but the only a slight difference when I raised the floats.

I'm a little lost, why is it detonating like this?

BTW: The carb is a Holley 4160 600cfm that can have my engine run as smooth as glass. But i guess not anymore.

 

[readymix]

Sounds like a timing issue to me

 

[Hogback Fabrication]

Detonating or backfiring? If you sucked mud through the motor you could have some valves hanging open.

 

[Chevy305]

Detonating or backfiring? If you sucked mud through the motor you could have some valves hanging open.

Definately detonating.

Also the truck did run after it sucked in some mud. Just the idle was a little rough and there was still a little mud on the secondary throttle plates so I decided a rebuild was in order even though above idle it was smooth.


Maybe my distributor isn't advanced enough? I will have to try again in the morning.

If anyone has any possible suggestions please post up!

 

[beater_k20]

so how exactly did you get mud into the carb...

 

[Chevy305]

so how exactly did you get mud into the carb...

http://youtube.com/watch?v=hthz1q7cdKA

That is how

Anyway, I advanced the timing a little more today and it helped slightly, but still sucking.

So I guess I will take the carb off and take it apart to make sure I didn't screw something up inside it.

Also seriously, any suggestions to what the problem might be, no matter how stupid they may be.

 

[K5-newf]

check to see if theres any mud your distributor might be water in the gas i dunno realy sounds liek timing did u try retard the timing


see i only look stupid

nice stepside by the way

 

[ryoken]

Retarding timing cures spark knock, not advancing it...

Are your advance weights working correctly?

 

[Chevy305]

Ya it was all working correctly until I pulled the carb to clean it up because I had a pool in my secondaries of muddy water. But I competely cleaned everything up and all teh dirt out of the carb, so I don't get it.

Also since off roading I never touched the ingnition or timing. That is why I am confused about the whole situation.

I will go set the timing back to where is was originally and then pull the carb and redo the rebuild.

 

[ryoken]

Just figured they might have gotten crudded and where hanging up...

Sounds like it may be leaning out on you...

Hope you didn't hurt the cylinders from that mud... Have you taken a peek at your oil?

 

[Chevy305]

Just figured they might have gotten crudded and where hanging up...

Sounds like it may be leaning out on you...

Hope you didn't hurt the cylinders from that mud... Have you taken a peek at your oil?

Ya I already changed the oil.

I could be just extremely lean, that might be the problem

I'll go out now and report back in a little while.

 

[JEBSR]

Are you sure you put the metering plates and jets on the correct side?

 

[Chevy305]

Ok so I figured it out!!

It turns out the accelerator pump wasn't pumping gas out of the main jets. So it was running extremely lean. So, after a bunch of tuning i got it running better than it did before I went offroading.

 

[JEBSR]

Good deal. Glad to here it