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.

Bak@EMSPowered · 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!

01-11-2008, 08:46 PM	#3 (permalink)
Oteck Eye'm the Str⑨ngest Join Date: Aug 2005 Location: Burnaby B.C. Posts: 4,945 Thanks: 11 Thanked 172 Times in 157 Posts Blog Entries: 3 iTrader Rating: (5/100% )	maybe the fuel pump went bad __________________ [Oteck's] Project car Garage Pending Projects 1mz/3mz VVTI Hybrid V6 \| LS430 Big Brakes \| Rotary Climate Control \| Power steering Commander \| Power Tilt & Telescopic Steering Column \| Completed Projects Stainless Door Sills \| Power Folding Mirrors \| Motorized/Steering Fog lamps \| Pedal Conversion \| LED Gauges \| Lexus Door Cover \| Sway bar Relocation Tab \| RFID Push Start

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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, 10:13 PM	#4 (permalink)
muffinman U-P-G-R-A-Y-E-D-D Join Date: Jan 2008 Location: Sunny South Florida Posts: 5,878 Thanks: 53 Thanked 282 Times in 271 Posts Blog Entries: 1 My Google Map iTrader Rating: (2/100% )	I'm having similiar problem my guess would be the pump.

01-11-2008, 10:22 PM	#5 (permalink)
Bak@EMSPowered Banned Seller Join Date: Oct 2005 Location: Austin, TX Posts: 5,925 Thanks: 30 Thanked 193 Times in 165 Posts My Google Map iTrader Rating: (49/93% )	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: 588 Thanks: 2 Thanked 50 Times in 49 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.