| [GMCnet] I love my Howell EFI [message #315089] |
Fri, 24 March 2017 22:20  |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Okay, I haven’t been very active here lately - frankly I’ve finally finished my bachelor’s degree at the tender age of 56! Needless to say we’ve been watching our nickels while I’m in school, so the GMC just hasn’t gotten any love. I have it parked at a friends house and go to make sure it’s not a rusted hulk from time-to-time. My Costco battery cranks the motor and the Howell EFI with electronic distributor ALWAYS starts the engine after about 3 revolutions. It’s amazing.
I know it will need some fine tuning, and I still have to fix the transmission vacuum modulator (no 3rd gear), but once I get back to work I expect we’ll be putting her back on the road in earnest.
No comment or information about other EFI setups - I suspect they are very good too - but my experience with the Howell and all the help offered here has been over the top positive.
The 455 burbles like and old Cutlass 4-4-2 and there is never a peep once you turn off the ignition.
My left (driver’s) side air-bag droops over time but pumps up after 15 minutes, or so, but otherwise I just love this coach.
I can’t wait to get back on the road!
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
Howell EFI + EBL + Electronic Distributor
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] I love my Howell EFI [message #315119 is a reply to message #315089] |
Sun, 26 March 2017 00:29  |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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ljdavick wrote on Fri, 24 March 2017 20:20
I know it will need some fine tuning, and I still have to fix the transmission vacuum modulator (no 3rd gear), but once I get back to work I expect we'll be putting her back on the road in earnest.
Larry,
I have had great luck with my EBL as well.
The transmission not shifting up may only be a vacuum leak. The modulator reacts to vacuum and a crack in the hose at the modulator or above at the intake manifold can cause no third gear. When my hose at the modulator developed a crack, my transmission would not shift up until I reached about 55mph. Then the shift was forced by the governor.
Check the tubes for cracks.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: [GMCnet] I love my Howell EFI [message #315123 is a reply to message #315119] |
Sun, 26 March 2017 07:59 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Also check the steel tube running on the passenger side of the intake manifold from front to rear for an obstruction. They occasionally get clogged up and then there is no vacuum at the modulator.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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