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starting to run a lil better..

607 Views 4 Replies 4 Participants Last post by  dag545
it runs nice till go to open it up... if i slowly ease in to it it pulls but once i floor it it spits and chugs and sputters with the occasional backfire....

any thoughts i have the fuel pressure at 38 psi on my 38 lb injectors...

if i go get the tune will they fix all that??
1 - 2 of 5 Posts
Some things I can think of for you to check...
Are you sure you have your timing set right? You should probably be running 12-14 base timing.
Do you have the correct spark plugs, electrode depth and heat range?
You are setting your fuel pressure with the vacuum port off right?
If you are setting it with the vacuum port still on the AFPR 38 at idle will be like 48 PSI at WOT.
And when you drive it you have the vacuum port hooked back up to a vacuum source?
Also, it might take some time for your computer to relearn the new setup.
Also, check for codes, this might tell you if any of the sensors are malfuctioning.

Your MAF and injectors are the same calibration, correct?

If everything checks out, it may just need a good tune.
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