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Old October 11th, 2013, 12:17 PM   #21
Haggar
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Example of someone having some similar issues, he had EGR issues...

http://www.colorado4x4.org/vbb/showt...ning-fuel-rich
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Old October 11th, 2013, 12:23 PM   #22
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Quote:
Originally Posted by Haggar View Post
TBI usually runs at 10-12 psi or so
agreed. I would think 30 psi unregulated would be too much for any TBI unit.
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Old October 11th, 2013, 01:14 PM   #23
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Quote:
Originally Posted by montecarlo33 View Post
agreed. I would think 30 psi unregulated would be too much for any TBI unit.
According to the paperwork from Howell the fuel pressure is correct. It regulates at the throttle body down to 13ish and then the excess goes to the return line. It is the factory spec pump from Howell.
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Old October 11th, 2013, 01:28 PM   #24
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Default Can't get my Howell tbi to run good

This quote is how I understand that the fuel pressure works



That is from the thread that you put the link to, hag gar.
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Old October 11th, 2013, 04:07 PM   #25
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Will a reasonably priced scanner of any sort help me out trouble shooting this thing?
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Old October 12th, 2013, 12:41 PM   #26
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Found a problem. The fuel pressures seemed right while I was sitting in the garage through the whole rpm range. I ran temporary fuel line for the supply and return into the cab and put gauges on them so I could read the fuel pressures as I drove it. The return line would be normal and then all of the sudden shoot to 30 psi, then eventually drop back to 3-4. It would do that on and off. I rigged the return line into a different part of the tank and now the pressures are staying more constant. I set the timing at 12* and reset the computer. I need to drive it for a while and let the computer learn the motor now. The good news is on my 20 minute drive that I took I could not get it to stall, hesitate or backfire. I'll report back after I do some longer driving later. Thanks for all the input everybody!
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Old October 12th, 2013, 01:01 PM   #27
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Sounds like you found a major problem.
Good job of being persistent.
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Old October 14th, 2013, 01:08 PM   #28
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I got a local guy programming me a new chip for the computer using the correct specs since Howell is such a pita to deal with. Every time I try to call them I spend forever on hold or the only guy that can help isn't there. I hope this takes care of the rest of my issues. If not, there will be a 6.0 going in this winter. I'm not wasting any more time and money on this setup.
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Old October 24th, 2013, 09:57 AM   #29
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Well the local guy dropped the ball on me. He said it was in the mail and it never arrived. Now he won't answer his phone or return calls. I called Howell and managed to talk to Troy without waiting on hold for 2 hours. He is going to overnight a chip to me which I should receive tomorrow. I hope the local guy returns my calls so I can thank him for wasting my time and money.
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Old October 25th, 2013, 11:50 AM   #30
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My package from Howell showed up this morning at 9 am. I hope this works, fingers crossed!
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Old October 25th, 2013, 02:53 PM   #31
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Drove it for about 45 minutes with the new chip. What a world of difference!
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Old October 25th, 2013, 03:39 PM   #32
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Good news.
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Old October 25th, 2013, 05:36 PM   #33
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Quote:
Originally Posted by FyrFyr View Post
Good news.
Yes sir it is! Wheeling on Sunday in the mountains, get your jeep packed up! :Sonicjay:
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