90 Bronco II
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From: taylor usa
We removed the distributor. It is clocked in the same position it was when we removed it. I was planning to roll it to tdc and start checking from there. Will also pull the codes. I don't know if I understand your question "do it by hand", do you mean did we attempt to set the advance or retard on the dist by hand? If so then yes. We walked it around a few degrees in each direction without any indication of change.
The plugs are still wet. This is what's got me stumped, that and the fact we drove it.
The plugs are still wet. This is what's got me stumped, that and the fact we drove it.
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From: taylor usa
Reading the pdf in the tech section the volt meter is simply between the battery and the STO pin, then jumper between the STI pig tail and the Sig Ret pin on the star connector? Need the same jumper for the check engine light also, correct?
I will most likely need to know all this as I am converting my 66 f100 to 5.0 w/efi and aod. Hopefully this will not be as big an ordeal as this BII is turning into.
These kids cars are turning into a second job...
S
I will most likely need to know all this as I am converting my 66 f100 to 5.0 w/efi and aod. Hopefully this will not be as big an ordeal as this BII is turning into.
These kids cars are turning into a second job...
S
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From: UT
A digital meter is probably doable, but an analog meter is usually better than a digital meter for reading codes because it's possible to miss a pulse with a digital meter. If you don't have an analog meter, I'd just use the check engine light.
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From: taylor usa
Sorry it took so long to get back to this. The codes we are seeing on this are during KOEO after running it to operating temp are 21, 51, 95, and 96. 21 and 51 are ECT codes. 95, 96 are for high speed fuel pump relay? It will start now but we need to pull the pump relay fuse to get it to start without flooding after it has run.
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From: UT
Which codes came before the separator pulse (KOEO codes) and which came after the separator pulse (memory codes)?
If you warmed the engine up and were still getting KOEO 21 and 51, then something is wrong with the ECT circuit.
KOEO/CM 95 and/or 96 indicate problems with the fuel pump circuit or the fuel pump monitor circuit. Since the fuel pumps appear to be running, I would suspect either a problem in the fuel pump monitor circuit, or someone has rewired the fuel pumps so the computer can no longer see the fuel pumps.
If you warmed the engine up and were still getting KOEO 21 and 51, then something is wrong with the ECT circuit.
KOEO/CM 95 and/or 96 indicate problems with the fuel pump circuit or the fuel pump monitor circuit. Since the fuel pumps appear to be running, I would suspect either a problem in the fuel pump monitor circuit, or someone has rewired the fuel pumps so the computer can no longer see the fuel pumps.
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From: taylor usa
21 came before the "10" separator pulse, 51, 95, and 96, are all after. During KOEO test we can hear the fuel pump come on. It does appear that the PO has put a new end on for the fuel pump relay. I will look at it better but from what I was seeing the lead colors match. The manual that came with the tester says that for a Continuous Memory code 95 = fuel pump secondary circuit fault, and for code 96 = fuel pump secondary circuit fault, high speed fuel pump relay open. Is there another fuel pump relay on this?
Do you think replacing the ECT relay is a correct fix for codes 21 and 51? This is easily serviceable.
Thanks
Scott
Do you think replacing the ECT relay is a correct fix for codes 21 and 51? This is easily serviceable.
Thanks
Scott
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From: UT
We have to watch terminology. There is not ECT (Engine Coolant Temperature) relay. ECT is a basic thermistor near the thermostat housing (and the dash gauge temperature sender) that tells the computer what temperature the engine is at. If the data from the ECT is way off, that can throw the mixture off. Rather than throwing parts at it, take your multimeter and check the wiring between the computer and the ECT before jumping out and buying a new ECT.
There's only one fuel pump relay that I'm aware of. If someone has fiddled with the wiring, it's possible that the fuel pump monitor circuit (between the computer [pin 8 I believe] and where it taps into the main fuel pump circuit) may have been neglected or have a short in it. It's also conceivable, where they are only CM codes, that they are old codes from a previous condition. First thing I would do for the fuel pump codes is clear the CM codes (disconnect jumper wire during KOEO/CM code output) then see if these codes come back.
There's only one fuel pump relay that I'm aware of. If someone has fiddled with the wiring, it's possible that the fuel pump monitor circuit (between the computer [pin 8 I believe] and where it taps into the main fuel pump circuit) may have been neglected or have a short in it. It's also conceivable, where they are only CM codes, that they are old codes from a previous condition. First thing I would do for the fuel pump codes is clear the CM codes (disconnect jumper wire during KOEO/CM code output) then see if these codes come back.
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From: taylor usa
Any idea of what resistance there should be across the ECT thermistor? I should be able to measure this and have some indication of the component accuracy at operating temp correct?
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From: taylor usa
Thinking about something here. I think the reason we are getting the 95 and 96 error codes is because, once warmed up, we have to start the Bronco by pulling the fuse for the fuel pump relay, or else it floods. I will clear the codes then pull them again.
S
S
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