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Author
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Topic: Idle problem/Trunk Battery install
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KCmustangboy
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Member # 1927
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posted
 
 
Has anyone installed the battery in their trunk and had a idle problem? I did the same install on my 90 Vert WITH mass air and had no problems, however on my 87 Speed density car I just did it today and had a major idle problem, also the fuel pump seems a lot louder than it was before. I am sure there is a issue with the fuel pump/ or fuel pressure. The car idles really bad and dies and then has a hard time starting, however if you pump the gas some you can get it to start and as long as you keep the rpms over 1500 it will run. I trying going around the block but driviblity is not good with the idle problem. Anyone know what might be up with the Battery install effecting the idle/ or fuel pump?
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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KCmustangboy
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Member # 1927
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posted
Anybody????
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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Stimson
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Member # 51
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posted
Sounds like either your electrical connections aren't as "strong" as they need to be or your power wires are too thin.
Do you have a digital volt meter? (and know how to use it?)
Posts: 2373 | Registered: Jun 2000
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FasterDamnit
Bad Attitude
Member # 442
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posted
Grounds, grounds, grounds. Then check for voltage drop.
Posts: 2971 | From: NorCal | Registered: Sep 2001
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Jeff S
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Member # 371
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posted
Definitely a grounding problem. You'll need to run a ground from the negative on the battery to a rear frame rail and also connecto a ground up front from the timing cover to the sway bar mount. The more grounds the better.
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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JoeT
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Member # 298
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posted
did you crimp the connectors or did you dump about a 1/4 pound of solder into the 1/0 welding cable? ![[Big Grin]](biggrin.gif)
are the crimps good? (I had one pull away once, but soldered the crap out of it later)
also--- where did you ground the battery?
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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hidnn.o.s.
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Member # 1219
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posted
How could his idle problem be connected to his battery? Wouldn't the battery JUST start the car and from there the alternator would take over?
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R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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KCmustangboy
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Member # 1927
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posted
Thanks guys I will go out and get working on it right now, I will update as too what happens! THANKS AGAIN!
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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KCmustangboy
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Member # 1927
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posted
Ok I have checked everything and it all seems to be hooked up right, voltage is good all over the car, grounds seem good, is the fuel pump just too far from the battery to get the right power? I don't know a lot about why it would be doing this. PLEASE HELP! ![[Frown]](frown.gif)
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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JoeT
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Member # 298
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posted
where the old battery ground was (timing cover to the battery), did you ground that somewhere? Is the engine grounded somewhere from that main line to the frame rail???
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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
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KCmustangboy
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Member # 1927
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posted
quote:
Originally posted by shade-tree:
where the old battery ground was (timing cover to the battery), did you ground that somewhere? Is the engine grounded somewhere from that main line to the frame rail???
Yes it most surely is, sway bar mount right next to it...
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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jmcclesk
Moderator
Member # 1355
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posted
Go to pro-m web site and to tech tips. Then look up batt relocation this will explain why the car has idle problems or call me and i will explain
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Ford trained ASE master tech.
Posts: 4024 | From: marrysville | Registered: May 2002
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KCmustangboy
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Member # 1927
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posted
BLAH! I hate cars, the battery is fine, when I did this I installed my MSD box under the hood where the battery was....unhooked MSD everything is fine... Sorry everyone for making you look up info.
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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hidnn.o.s.
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Member # 1219
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posted
quote:
Originally posted by hidnn.o.s.:
How could his idle problem be connected to his battery? Wouldn't the battery JUST start the car and from there the alternator would take over?
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R.I.P. Willie G. You are missed on this forum
Posts: 15950 | Registered: Apr 2002
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