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Mar 18, 2014 | 07:39 PM

#16

DMT 351

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Hey guys got to thinking about things to check and thought about the timeing since I changed the computer . Checked it and it was 8 deg,s out. set it run like champ. Thanks for the help.

Mar 18, 2014 | 09:43 PM

#17

rla2005

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From: Kentucky

Changing the computer will not effect the base timing. Did you unplug the SPOUT when you checked and adjusted the timing?

If you really have a 5.8L engine that PCM will not be very happy.

Mar 18, 2014 | 10:14 PM

#18

danr1

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From: Sand Lake, MI

Quote:

Originally Posted by rla2005

Changing the computer will not effect the base timing. Did you unplug the SPOUT when you checked and adjusted the timing?

If you really have a 5.8L engine that PCM will not be very happy.

Yea base timing is set with spout removed so computer has nothing to do with it, if base timing is changing it is different each time you put a light on it? then something else is wrong. Say for example the outer ring on dampener is slipping.

Plus one on the 302 computer running a 351 aspect too, both computers use timing and fuel curves based on each engines total volume, each engine's "volumetric efficiency" how much air moves through and at any given rpm.

At minimum a 351 running on a 302 computer would very likely result in lean condition, one it'd likely continually need fight to overcome especially in the upper rpm ranges.

Mar 18, 2014 | 10:23 PM

#19

danr1

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From: Sand Lake, MI

Quote:

Originally Posted by DMT 351

Ok I got a new PCM got it in today run good until I went for a drive down on power bad.thought it might be the spark plugs so put new ones in44 gap . So I checked for codes but my code reader would not read the new PCM what's up with that it's driving me nuts.

Wrong computer or not where you able to run the self test and get a proper reply at any point?

You should at a minimum get "system pass" codes as a result.

If you couldn't with the original computer and now can not with the "good" replacement computer you have other underlying issues yet need addressed.

Mar 19, 2014 | 03:40 PM

#20

DMT 351

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Yes sir pulled the Spout set timeing and then ran for codes the only codes found are from wear I delete the egr? What to you think about changing over to mass air found the computer , wireing and ever thing to go with it from a friend of mine? Just a thought.

Mar 26, 2014 | 08:14 AM

#21

DMT 351

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Hey guys you are right that 5.0 computer want run that 5.8. So I have thought about things and need help on what to do.change the computer to 5.8 or do a Mass air Conv. Will this computer num.work in my truck 5.8 e40d. MUG-4F6TF -12A650-WE . Thanks .

Mar 26, 2014 | 08:29 AM

#22

rla2005

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From: Kentucky

Quote:

Originally Posted by DMT 351

Hey guys you are right that 5.0 computer want run that 5.8. So I have thought about things and need help on what to do.change the computer to 5.8 or do a Mass air Conv. Will this computer num.work in my truck 5.8 e40d. MUG-4F6TF -12A650-WE . Thanks .

I am pretty sure that is an OBD-II PCM. Swapping that in is a lot bigger project than you probably want to deal with.

Mar 26, 2014 | 08:25 PM

#23

DMT 351

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It's in a 1996 truck along with the wiring and air box ,every thing you would need if it will work? If not maybe someone on hear could use it..thanks for all the help.