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10-27-2015, 10:29 AM
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#1 |
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Join Date: Nov 2002
Location: Freeport, IL
Posts: 467
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Re: starts breaking up at 4500 rpm.
Are your fuel injectors sized properly for the HP you are making? Have you had all of the injectors flowed to make sure one or more of them aren't flowing too low?
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Marty Buth 3657 STK |
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10-27-2015, 10:21 PM
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#2 |
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Member
Join Date: Apr 2005
Location: rohnert park,ca
Posts: 414
Likes: 11
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Re: starts breaking up at 4500 rpm.
injectors were fine before I changed the tank and lines. car was running 12.30's until I had this bright idea.
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bob beals 7244 |
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10-30-2015, 10:58 AM
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#3 |
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Senior Member
Join Date: Sep 2006
Location: Bellevue Ohio
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Re: starts breaking up at 4500 rpm.
Bob, never saw a reply about what your 02 sensor does during the issue...goes dead lean, dead rich? That might shed some light on what's happening.
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Joe Buchanan SS/BX 3117 |
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10-30-2015, 07:59 PM
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#4 | |
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Location: rohnert park,ca
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Re: starts breaking up at 4500 rpm.
Quote:
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bob beals 7244 |
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10-30-2015, 08:10 PM
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#5 |
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Senior Member
Join Date: Feb 2002
Location: Southeast Michigan
Posts: 910
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Re: starts breaking up at 4500 rpm.
Do you have a good vent on that fuel cell ?
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10-30-2015, 09:01 PM
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#6 |
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Senior Member
Join Date: Mar 2006
Posts: 977
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Re: starts breaking up at 4500 rpm.
May be a really stupid question but check that the return is not connected to the vent on the cell, as its a one way check. This would dead head the pump and the regulator, the check may allow some flow but I would be surprised.
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Sean Marconette 84 Mustang 5060 SS/N |
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10-31-2015, 09:18 AM
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#7 |
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Member
Join Date: Apr 2005
Location: rohnert park,ca
Posts: 414
Likes: 11
Liked 79 Times in 11 Posts
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Re: starts breaking up at 4500 rpm.
return is unblocked. -8 line for a vent line.
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bob beals 7244 |
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