88 FC cranking but wont start
#26
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And this test was done w/the key to on? And you have to make sure the Main Pulley rotates as the alternator belt is turned. Was this part done correctly? If the pulley didn't budge then the test will not indicate a proper voltage reading.
EDIT: I also made a typing mistake and meant to state that the G/Y wire should have zero volts which briefly then indicates 5 volts then back to zero volts and not the reverse as previously stated.
EDIT: I also made a typing mistake and meant to state that the G/Y wire should have zero volts which briefly then indicates 5 volts then back to zero volts and not the reverse as previously stated.
Im not the best with a Multimeter so just to make sure im doing things right ill tell you how I do it, I poke a little hole in the wire then put the black pin inside the whole while the red is touching the negative terminal of the battery? That sound right or am I doing it wrong? It would be a good thing to know before I go any further with testing.
#27
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Yes It was hard to turn and I could hear the rotor rotating in the housing.
Im not the best with a Multimeter so just to make sure im doing things right ill tell you how I do it, I poke a little hole in the wire then put the black pin inside the whole while the red is touching the negative terminal of the battery? That sound right or am I doing it wrong? It would be a good thing to know before I go any further with testing.
Im not the best with a Multimeter so just to make sure im doing things right ill tell you how I do it, I poke a little hole in the wire then put the black pin inside the whole while the red is touching the negative terminal of the battery? That sound right or am I doing it wrong? It would be a good thing to know before I go any further with testing.
#29
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If you still can't get the zero to five reading then disconnect the CAS pigtail and clean it and reconnect it and look for spark as previously done. If that doesn't work then disconnect the CAS once again and plug in the spare and w/key to on spin the CAS and not only should there be spark but the injectors should click as well.
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OK, so knowing how to test right I went through everything again and got some different results
The Black/Yellow wire is getting 12v with the key to on.
With the key to on: The Green/Yellow wire still does not read anything but 0v I can see the main pully moving througholy. Does the main pully have to move constantly? because I am moving the pully by strokes not at a constant speed.
With the key to on and it plugged in: The solid Brown TPS wire going from the TPS to the clip is not getting any reading other than 0v, I used The mulimeter properly as said, and even used the test light and nothing. BUTT i noticed that the TPS bracket had a bolt missing! and the TPS was really loose and not hitting that throttle bar (or whatever you call it) and the TPS wasnt moving its sensor I guess. So I fixed it and its really solid and is hitting the throttle bar to make it move. Tested the brown wire again after fixing and still no reading.. After fixing the TPS I tried starting it and no good.
With the key to on: Cleaned the pigtail end of the CAS (even tho it looked pretty clean) and tried for spark and maybe a reading on the Green/Yellow wire and nothing still. Got my spare CAS from the Turbo II and hooked it up to the car, Tested for spark like satch said and listened for and clicking noise of an injector and heard nothing.
The Black/Yellow wire is getting 12v with the key to on.
With the key to on: The Green/Yellow wire still does not read anything but 0v I can see the main pully moving througholy. Does the main pully have to move constantly? because I am moving the pully by strokes not at a constant speed.
With the key to on and it plugged in: The solid Brown TPS wire going from the TPS to the clip is not getting any reading other than 0v, I used The mulimeter properly as said, and even used the test light and nothing. BUTT i noticed that the TPS bracket had a bolt missing! and the TPS was really loose and not hitting that throttle bar (or whatever you call it) and the TPS wasnt moving its sensor I guess. So I fixed it and its really solid and is hitting the throttle bar to make it move. Tested the brown wire again after fixing and still no reading.. After fixing the TPS I tried starting it and no good.
With the key to on: Cleaned the pigtail end of the CAS (even tho it looked pretty clean) and tried for spark and maybe a reading on the Green/Yellow wire and nothing still. Got my spare CAS from the Turbo II and hooked it up to the car, Tested for spark like satch said and listened for and clicking noise of an injector and heard nothing.
#31
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OK, so knowing how to test right I went through everything again and got some different results
The Black/Yellow wire is getting 12v with the key to on.
With the key to on: The Green/Yellow wire still does not read anything but 0v I can see the main pully moving througholy. Does the main pully have to move constantly? because I am moving the pully by strokes not at a constant speed.
With the key to on and it plugged in: The solid Brown TPS wire going from the TPS to the clip is not getting any reading other than 0v, I used The mulimeter properly as said, and even used the test light and nothing. BUTT i noticed that the TPS bracket had a bolt missing! and the TPS was really loose and not hitting that throttle bar (or whatever you call it) and the TPS wasnt moving its sensor I guess. So I fixed it and its really solid and is hitting the throttle bar to make it move. Tested the brown wire again after fixing and still no reading.. After fixing the TPS I tried starting it and no good.
With the key to on: Cleaned the pigtail end of the CAS (even tho it looked pretty clean) and tried for spark and maybe a reading on the Green/Yellow wire and nothing still. Got my spare CAS from the Turbo II and hooked it up to the car, Tested for spark like satch said and listened for and clicking noise of an injector and heard nothing.
The Black/Yellow wire is getting 12v with the key to on.
With the key to on: The Green/Yellow wire still does not read anything but 0v I can see the main pully moving througholy. Does the main pully have to move constantly? because I am moving the pully by strokes not at a constant speed.
With the key to on and it plugged in: The solid Brown TPS wire going from the TPS to the clip is not getting any reading other than 0v, I used The mulimeter properly as said, and even used the test light and nothing. BUTT i noticed that the TPS bracket had a bolt missing! and the TPS was really loose and not hitting that throttle bar (or whatever you call it) and the TPS wasnt moving its sensor I guess. So I fixed it and its really solid and is hitting the throttle bar to make it move. Tested the brown wire again after fixing and still no reading.. After fixing the TPS I tried starting it and no good.
With the key to on: Cleaned the pigtail end of the CAS (even tho it looked pretty clean) and tried for spark and maybe a reading on the Green/Yellow wire and nothing still. Got my spare CAS from the Turbo II and hooked it up to the car, Tested for spark like satch said and listened for and clicking noise of an injector and heard nothing.
#32
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It's a bit strange you measured 5 volts on the Brown wire for the TPS before and now you have zero volts. There is a Green check connector with four wires near the leading coil. Three are Yellow based and the 4th is Black/White. W/key to on check for battery voltage on the B/W wire. If there is no voltage on it then the COMP fuse might have blown once again. If there is voltage on this B/W wire then a possible cause of your problem relates to a loose engine ground or a loose connector above and to the right of the ECU (connector is Orange). And when you tested the Brown TPS wire before was the connector plugged or unplugged?
When I tested the brown wire and got 5v it was connected, but I think I put the red pin to ground to the positive side of the battery and the black pin into the brown wire and got a 5v(prob more) from doing that. When I tested it today I put the black pin on the negative terminal and the red pin in the wire i was testing, and it came up with nothing. with it plugged in of course and the key to on. And as I said I even used a test light and that came up short also. I checked all the fuses after completing all my tests today and all were good.
I will check the green plug tomarrow as soon as I can, as well as the orange clip.
Thanks for your patience
#33
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And one other thing. If the B/W wire doesn't have power then proceed to check the four wire plug at the Main Relay ( relay has two plugs to it, and mounted to the driver side fender near the trailing coil). There will be a White/Blue wire in this plug and it should have constant power (no key necessary). If it does not then chances are the White/Blue wire which is powered by the 30 amp COMP fuse has come loose underneath the Engine fuse box.
#35
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I would check the Brown wire at the TPS one more time and you could use the alternator casing for a ground if need be. As I stated previously, if the meter leads are accidentally switched the net result is the voltage reading would have a minus sign to it, but it would still give you an accurate number, so I am a bit confused as to how it indicated 5 volts one day and then 0 volts the following time.
#36
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Yup tried the Brown wire again and im not getting anything close to 5v, I am getting a steady .13v on it tho if that means anything lol I got a picture of the brown wire im testing just to make sure its the right one... and if im testing the right thing.... ha... ignore the temporary bolt to secure the sensor in place.
Im testing that middle wire.
also for the sake of it I tested the blue wire on the main relay plug without the key and it read 12v
Im testing that middle wire.
also for the sake of it I tested the blue wire on the main relay plug without the key and it read 12v
Last edited by mario4817; 11-29-11 at 04:51 PM.
#37
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There are two Orange connectors located side by side and very close to the passenger kick panel (above and to the right of the ECU position). One connector has 15 wires while the other has 13. The one w/13 wires has two Black/White wires. Check these for voltage w/key to on. This wire powers up the ECU. Focus on the bottom or lower side of the connector as the top is from the Front harness and the bottom part is the Emission harness and it is this part which is easier to access.
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Not ahard to check t all. Front passenger side attached to the air box. Its roght there and has a rectangular plug going into it (if its connected that is)
True satch I was just throwing it out there since i seen that it hadnt been mentioned yet.
True satch I was just throwing it out there since i seen that it hadnt been mentioned yet.
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In the last picture I posted the bottom side of the clip there are two different sets of black/white wires.... going from left to right it goes yellow, yellow/black, black/white, blue, and then another black and white... which black and white am i testing?
#48
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There are only two B/W wires on the Emission side of the connector and three on the Front harness side so check both B/W wires on the side that has only two B/W wires which would be the emission side.
And when you use the Red meter lead to check for voltage on the wire make sure the lead is stuck firmly and snug into the back of the plug and making contact with the wire clip inside the plug.
And when you use the Red meter lead to check for voltage on the wire make sure the lead is stuck firmly and snug into the back of the plug and making contact with the wire clip inside the plug.
#49
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Never will I be a electrician lol, ok so I think i know the wires your talking about, on the bottom of the clip there is a set of fat black/white wires that have no voltage but they are kinda spread apart from each other
But there is another set of black/white wires that are right next to each other. tested one wire and it read 12v, tested he other and it read 1.3v was the most i got out of it
So with reading those I decided to follow it up the clip to two other black/white wires that were right next to each other and one read 12v and the other 1.3v was the most i got out of it.
But there is another set of black/white wires that are right next to each other. tested one wire and it read 12v, tested he other and it read 1.3v was the most i got out of it
So with reading those I decided to follow it up the clip to two other black/white wires that were right next to each other and one read 12v and the other 1.3v was the most i got out of it.
#50
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Never will I be a electrician lol, ok so I think i know the wires your talking about, on the bottom of the clip there is a set of fat black/white wires that have no voltage but they are kinda spread apart from each other
But there is another set of black/white wires that are right next to each other. tested one wire and it read 12v, tested he other and it read 1.3v was the most i got out of it
So with reading those I decided to follow it up the clip to two other black/white wires that were right next to each other and one read 12v and the other 1.3v was the most i got out of it.
But there is another set of black/white wires that are right next to each other. tested one wire and it read 12v, tested he other and it read 1.3v was the most i got out of it
So with reading those I decided to follow it up the clip to two other black/white wires that were right next to each other and one read 12v and the other 1.3v was the most i got out of it.
EDIT: The two B/W wires in the Emission side of the Orange connector should be side by side and one should be next to the Brown/Yellow wire and the other next to the Yellow wire. And the B/W wire in the Emission side that you should not be testing is fed by a Black/Red wire from the front side of the Orange connector. So the two wires you focus on are fed by B/W wires from the front side of the connector and not another color.