Skip to main content
Topic: Current draw (Read 2831 times) previous topic - next topic

Current draw

Reply #15
Thanks, did it and it primes.  Now I guess either I have a bad computer, or I mess up the wiring for the mass air...
1988 Thunderbird Sport (1st car)
351W in the works
"I'll get it one piece at a time...":D

Quote from: bhazard;300566
You got woman'd.

Current draw

Reply #16
Quote from: tireshredder;270364
Thanks, did it and it primes.  Now I guess either I have a bad computer, or I mess up the wiring for the mass air...

Do you mean it primes without the jumper?

Current draw

Reply #17
Sorry.  I meant I did the test.  Jumping it made the pump run.  Key still doesn't work.
1988 Thunderbird Sport (1st car)
351W in the works
"I'll get it one piece at a time...":D

Quote from: bhazard;300566
You got woman'd.

Current draw

Reply #18
Will the car start if you leave the jumper on?

Current draw

Reply #19
No.  Pressure got up around 40 when I tried it.
1988 Thunderbird Sport (1st car)
351W in the works
"I'll get it one piece at a time...":D

Quote from: bhazard;300566
You got woman'd.

Current draw

Reply #20
Sounds like the EEC is bad.
Well let me rethink that.
You said earlier it pulsed the injectors. Is that still the case?

Current draw

Reply #21
I was about to post they were, but then tested it, and sure enough.... no clicking...

It all happened after we took off the upper manifold to check the injectors.  But what could we have hit up there?
1988 Thunderbird Sport (1st car)
351W in the works
"I'll get it one piece at a time...":D

Quote from: bhazard;300566
You got woman'd.

Current draw

Reply #22
Quote from: tireshredder;271451
It all happened after we took off the upper manifold to check the injectors.  But what could we have hit up there?

Don't know, but the ECC is not working for some reason.
The only thing I can think of other than it being bad is voltages and grounds.

Your negative battery cable should have a small BK/LG pigtail wire that goes to a one wire connector near the battery. This is the ground wire for the EEC. It goes to EEC pins 40 and 60.

The EEC also has a chassis ground on pin 20. This wire goes to the cowl near the EEC.

EEC pin 1 is hot at all times.
EEC pins 37 and 57 are hot in start or run.


Current draw

Reply #24
No, I bought the kit it mentioned and used the instructions that came with it.
1988 Thunderbird Sport (1st car)
351W in the works
"I'll get it one piece at a time...":D

Quote from: bhazard;300566
You got woman'd.

Current draw

Reply #25
If the TPS ground is open, the EEC will enter dechoke mode and shut down the injectors... Need to verify the voltage back to the EEC is at less than 1v... If it's over approx 4v, the injectors will be shut off...

Current draw

Reply #26
Ok, all those pins check out.  Mass air wires have power to, so the wirings ok.
What pin is the TPS sensor?
1988 Thunderbird Sport (1st car)
351W in the works
"I'll get it one piece at a time...":D

Quote from: bhazard;300566
You got woman'd.

Current draw

Reply #27
with the tps still plugged in,,,,,,,,

turn on key
ground your neg meter lead to chassis or engine
back probe the tps connector green wire
voltage should be less than 1VDC.

Current draw

Reply #28
Quote from: tireshredder;272367
Ok, all those pins check out.  Mass air wires have power to, so the wirings ok.
What pin is the TPS sensor?

Pin 47

Current draw

Reply #29
Well, figured out the TPS problem.... brother unplugged the distributor.... why, I'll never know.... I'll still test it tomorrow.

So I guess that puts it back to bad ECU.  Fuel pump still doesn't prime.
1988 Thunderbird Sport (1st car)
351W in the works
"I'll get it one piece at a time...":D

Quote from: bhazard;300566
You got woman'd.