ECU or EFI???

BannanaMan · 01-10-2008, 07:54 PM

Help!!!
I have an 87 MR@ that is getting no power to the fuel pump.
Have checked the EFI and FI relays and open circuit relay. All good.
The manual says check to see if you have power on the F2 wire on the open circuit relay.
I don't... and it doesn't say what to check if you don't.
Is the EFI bad or is the ECU not sending signal???
How would I check either of these???

Any thoughts/comments would be appreciated!

BannanaMan · 01-11-2008, 08:40 PM

I used a wire to jump the open circuit relay which put power to the fuel pump but it still will not crank. (not getting fuel)

Oteck · 01-11-2008, 08:46 PM

maybe the fuel pump went bad

muffinman · 01-11-2008, 10:13 PM

I'm having similiar problem my guess would be the pump.

baktasht · 01-11-2008, 10:22 PM

check your fuel filter too.... i've recently had one of my mr2's not even start because of a really dirty fuel filter.

Papo J · 03-04-2008, 12:31 PM

With the key on turn the AFM door by hand and see if the pump comes on, it could be a vacuum leak before the AFM. On the NA MK1 the fuel pump relay is powered by the movement of the AFM door.

01-10-2008, 07:54 PM	#1 (permalink)
BannanaMan No Skills Join Date: Jan 2008 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	ECU or EFI??? Help!!! I have an 87 MR@ that is getting no power to the fuel pump. Have checked the EFI and FI relays and open circuit relay. All good. The manual says check to see if you have power on the F2 wire on the open circuit relay. I don't... and it doesn't say what to check if you don't. Is the EFI bad or is the ECU not sending signal??? How would I check either of these??? Any thoughts/comments would be appreciated!

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01-11-2008, 08:40 PM	#2 (permalink)
BannanaMan No Skills Join Date: Jan 2008 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	I used a wire to jump the open circuit relay which put power to the fuel pump but it still will not crank. (not getting fuel)

01-11-2008, 08:46 PM	#3 (permalink)
Oteck RAAAGE! Join Date: Aug 2005 Posts: 2,112 Thanks: 8 Thanked 60 Times in 57 Posts Blog Entries: 2 iTrader Rating: (3/100% )	maybe the fuel pump went bad

01-11-2008, 10:13 PM	#4 (permalink)
muffinman Brain Surgeon Join Date: Jan 2008 Location: Ft. Lauderdale Posts: 1,752 Thanks: 24 Thanked 100 Times in 98 Posts My Google Map iTrader Rating: (1/100% )	I'm having similiar problem my guess would be the pump.

01-11-2008, 10:22 PM	#5 (permalink)
baktasht EMSPowered.com Join Date: Oct 2005 Location: Austin, TX Posts: 4,578 Thanks: 19 Thanked 130 Times in 115 Posts My Google Map iTrader Rating: (41/98% )	check your fuel filter too.... i've recently had one of my mr2's not even start because of a really dirty fuel filter.

03-04-2008, 12:31 PM	#6 (permalink)
Papo J 6SPD GTE Join Date: Sep 2006 Posts: 188 Thanks: 1 Thanked 19 Times in 18 Posts iTrader Rating: (0/0% )	With the key on turn the AFM door by hand and see if the pump comes on, it could be a vacuum leak before the AFM. On the NA MK1 the fuel pump relay is powered by the movement of the AFM door.