voltage at the fuel pump on TIIs
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From: St Louis, MO, USA
voltage at the fuel pump on TIIs
Everybody seems to be concerned about the voltage on modded cars. Why can't we install a voltmeter and connect it to the fuel pump to read the voltage at the pump to keep an eye on the issue?
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From: n
NO!  That backlight with the LCD SUCKS! 
http://www.walbro-tdd.com/Data/Engli..._features.html
It's a reverse LCD with true backlighting that I wished MoTeC had done.  It's a much better contrast under "dark conditions."
-Ted
http://www.walbro-tdd.com/Data/Engli..._features.html
It's a reverse LCD with true backlighting that I wished MoTeC had done.  It's a much better contrast under "dark conditions."
-Ted
I'm a boost creep...
Joined: Jan 2002
Posts: 15,608
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From: Auckland, New Zealand
Originally posted by RETed
It's a reverse LCD with true backlighting that I wished MoTeC had done. It's a much better contrast under "dark conditions."
It's a reverse LCD with true backlighting that I wished MoTeC had done. It's a much better contrast under "dark conditions."
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From: n
Originally posted by NZConvertible
Yeah, I see what you mean, much better looking. Ever stuck your head into a WRC Impreza? That's very similar to what they use. Very cool!
Yeah, I see what you mean, much better looking. Ever stuck your head into a WRC Impreza? That's very similar to what they use. Very cool!
The only time I'd get a chance if those puppies make our crappy ProRally circuit by the SCCA.  It's such a MUTED race versus a true FIA WRC race!
-Ted
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I'm a boost creep...
Joined: Jan 2002
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From: Auckland, New Zealand
Originally posted by RETed
You gonna make me slap you upside the head for bragging???
You gonna make me slap you upside the head for bragging???
I've worked for the NZ Rally for the past few years in the Service Parks. Basically assembling, controlling, marshalling and disassembling. There is no other way to get any closer to all the teams and cars, including all the WRC guys. It's amazing what you can get away with wearing an "Official" swinger! WRC rocks!
You can start slapping now!
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From: Grafton WV
**** hmm this may be my problem i just went out and hook a meter to it showed about 9 till around redline then how 11-12. one time i seen it do the higher volt at 5 but only the one time, should i see a change when reving it?
I wish I was driving!
Joined: Dec 2001
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From: BC, Canada
In the rear of the car, leading through the fuel pump cover plate, there are two wires. Check there.
An extra ground on the pump never hurts.
Of course,neither does a sumped tank with an inline pump and twin filters
Sean Cathcart
Edit: (been drinking, last day of class). Yes, voltage at idle and very light throttle will be much lower than at WOT,
An extra ground on the pump never hurts.
Of course,neither does a sumped tank with an inline pump and twin filters
Sean Cathcart
Edit: (been drinking, last day of class). Yes, voltage at idle and very light throttle will be much lower than at WOT,
I wish I was driving!
Joined: Dec 2001
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From: BC, Canada
7 or 8 volts? not very high for sure. Wish I could give you exact specs, but I always use a custom wired inline pump.
I would'nt worry about upmp voltage at idle. You'll never detonate and pop your motor at idle.
Worry about getting 12V at WOT with all of you accessories on, such as lights, a/c, stereo, etc.
Sean
I would'nt worry about upmp voltage at idle. You'll never detonate and pop your motor at idle.
Worry about getting 12V at WOT with all of you accessories on, such as lights, a/c, stereo, etc.
Sean
I wish I was driving!
Joined: Dec 2001
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From: BC, Canada
That would require a fuel pump rewire, I think. Or a custom wired pump
Sean Cathcart
shutup_billy@hotmail.com <-- any q's......
Sean Cathcart
shutup_billy@hotmail.com <-- any q's......
I'm a boost creep...
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From: Auckland, New Zealand
OK, the ECU controls a resistor and relay in the engine bay that runs full battery voltage to the pump at start up and under high load, and cuts it down to ~9V the rest of the time. Improves pump life apparently, and it's safe to assume that the pump is sized to suit this variable voltage and the ECU's fuel maps were also written to take this into account.
Here's a link on how to rewire the fuel pump to improve voltage to the pump, which can drop over the years as the wiring deteriorates through age. This is recommended for ANY TII, but I would consider it imperative if you're upgrading your pump. The procedure in the above link will be much easier to understand if you print out the fuel pump wiring diagram on page 50-34 of the 88 FSM. The section on the fuel pump in the EFI chapter (page 4B-72) is also useful.
Good luck!
Here's a link on how to rewire the fuel pump to improve voltage to the pump, which can drop over the years as the wiring deteriorates through age. This is recommended for ANY TII, but I would consider it imperative if you're upgrading your pump. The procedure in the above link will be much easier to understand if you print out the fuel pump wiring diagram on page 50-34 of the 88 FSM. The section on the fuel pump in the EFI chapter (page 4B-72) is also useful.
Good luck!
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From: Grafton WV
thanks alot guys, im gonna go ahead and rewire it for now, but i want to try sticking another ecu in it cause theres still other little problems that i dont have any clue what could cause them other than a messed up ecu
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