351 not running right

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Apr 24, 2006 | 09:50 PM

#16

Bdox

Fleet Owner

Joined: Sep 2005

Posts: 28,609

Likes: 18

From: Lake Tahoe, Nevada

Richening is basically rejetting the carb.

But you really need to insure that both cam and ignition timing is correct. It sounds like the chain is stretched or jumped a tooth. Do you know how to test for this?

Also, if it is lean, and it may not be, first make sure that the float level is correct before you start changing jets. Also be certain that there are no vacuum leaks too.

Apr 25, 2006 | 10:03 PM

#17

hatcatz

Thread Starter

Junior User

Joined: Apr 2003

Posts: 60

Likes: 0

well i thank u for your help bdox but unfortunatly i dont have the old carb shes got the fuelinjection

Apr 25, 2006 | 10:08 PM

#18

Bdox

Fleet Owner

Joined: Sep 2005

Posts: 28,609

Likes: 18

From: Lake Tahoe, Nevada

Quote:

Originally Posted by hatcatz

well i thank u for your help bdox but unfortunatly i dont have the old carb shes got the fuelinjection

Sorry about that. I should have paid closer attention to your first post.

So, if it's lean, first check your fuel pressure.

Apr 26, 2006 | 08:47 PM

#19

hatcatz

Thread Starter

Junior User

Joined: Apr 2003

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it ok bdox ill check and thanks

Apr 27, 2006 | 02:41 PM

#20

MrG4x4

Mountain Pass

Joined: Aug 2005

Posts: 140

Likes: 1

From: Seattle

Timing is your best bet for the problem. If and when it's correct, and you still have the same problem then probably a lean condition is occuring as suggested. Fuel pressure definately would be a good candidate for that, at idle probably should be around 32 psi and 40 as you get closer to wide open throttle. Your stock fuel pressure regulator should have a vacuum line on it. Dirty fuel filter could be a cause for poor fuel pressure, but not likely at idle. You also might try pulling the codes of the computer, they may help verify the lean condition problem.