Damn! What Can It Be? The Pfc?
Thread Starter
Senior Member
Joined: Feb 2002
Posts: 6,331
From: Frederick MD
Originally Posted by jeff48920' date='Mar 2 2004, 10:51 AM
I am just thinking out loud here for a second on the injector %s.
If, in reality, you are seeing 0% in an ungrounded state and 100% in the grounded state, we are back to the problem that the PFC is not sending or the injectors are not recieving the pulsed ground.
There are only a few possibilities that I can think of about why this would happen:
1. Bad ECU - rejected because of tests with alternate ECUs
2. Bad wiring between ECU and Injector- rejected because of continuity and noid light tests
3. Bad injectors which do not open at all unless under constant grounding.
4. Wrong wire cut to ECU-not bloody likely.
I would recommend against driving the car with the injectors grounded permanently until you determine the reason that they do work in that state.
Can you borrow a set of 550's or dig out your old 850's and replace the primaries to test the injectors themselves?
Good Luck
Jeff
If, in reality, you are seeing 0% in an ungrounded state and 100% in the grounded state, we are back to the problem that the PFC is not sending or the injectors are not recieving the pulsed ground.
There are only a few possibilities that I can think of about why this would happen:
1. Bad ECU - rejected because of tests with alternate ECUs
2. Bad wiring between ECU and Injector- rejected because of continuity and noid light tests
3. Bad injectors which do not open at all unless under constant grounding.
4. Wrong wire cut to ECU-not bloody likely.
I would recommend against driving the car with the injectors grounded permanently until you determine the reason that they do work in that state.
Can you borrow a set of 550's or dig out your old 850's and replace the primaries to test the injectors themselves?
Good Luck
Jeff
There just has to be SOMETHING that the injectors are seeing when connected together that they aren't when they are seperate.. Signal of course, but from where? The ECU? NOPE. Checked that.. so WTF?? The ECU is the only place that those 2 goldarn ground wires go.. and I've ohmed the harness out AGAIN and nothing shows up..
Thanks for your help again Jeff.
Senior Member
Joined: Dec 2001
Posts: 993
From: Panama City Beach, Florida
well you checked out your Main Relay? And the Circuit Main Relay?
F-165 and F-188 of shop manual.
So, i'd check those... make sure you here everything clicking when you turn the car to "ON". So check that out.. maybe its not it.. but worth a shot. The shop manual doesn't seem to go into too much detail as to what could cause the injectors not to fire.. but the relays of course will have a great deal to do with them.
F-165 and F-188 of shop manual.
So, i'd check those... make sure you here everything clicking when you turn the car to "ON". So check that out.. maybe its not it.. but worth a shot. The shop manual doesn't seem to go into too much detail as to what could cause the injectors not to fire.. but the relays of course will have a great deal to do with them.
Thread Starter
Senior Member
Joined: Feb 2002
Posts: 6,331
From: Frederick MD
Originally Posted by twinturborx7pete' date='Mar 2 2004, 02:57 PM
ok cool pic.. check the main relay tho..
also did you OHM the injectors by themselves? should get 13.8 ohms
F-107 of manual.
also did you OHM the injectors by themselves? should get 13.8 ohms
F-107 of manual.
Roger. I'll do that.
What am I looking for in the main relay? Wouldn't anything else bee goofy (not just the injectors)?
Senior Member
Joined: Dec 2001
Posts: 993
From: Panama City Beach, Florida
yah from one lead to the next on the injector u should read 13.8 ohms or u have a bad injector.
the main relay should click.. if you can't hear it click.. (there are 2 relays that click.. the main and the circuit relay) which are right next to one another... u need to pull it and check the continuity from C to D. IF there is none. you have a bad relay.
If you have a shop manual its on the pages i listed.. for the pins for the relays. Thats all the fuel system is.. the relays, the wires to the injectors, and the resistance of the injector themselves... went thru the whole manual for ya
the main relay should click.. if you can't hear it click.. (there are 2 relays that click.. the main and the circuit relay) which are right next to one another... u need to pull it and check the continuity from C to D. IF there is none. you have a bad relay.
If you have a shop manual its on the pages i listed.. for the pins for the relays. Thats all the fuel system is.. the relays, the wires to the injectors, and the resistance of the injector themselves... went thru the whole manual for ya
