94 Explorer engine jingle
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From: South East Ohio Area
94 Explorer engine jingle
Hello Guys,
I just did my engine swap from a 1991 Explorer into a 1994 Explorer. The 4.0 that I swapped in from the 91, makes a jingle or like a laboring noise, when excellerating. Sounds like it would if the timing was off. Since this has power packs and not a distribitor, just how do I try to adjust this? And what do I adjust ?
It took me 3 days to do the swap by myself with the hardest part of lining up the engine to the tranny. I was pating myself on the back till I saw all the antifreeze pouring out of the bottom radiator hose that I forgot to clamp. Lucky for me that my catch pan was under the car.
I just did my engine swap from a 1991 Explorer into a 1994 Explorer. The 4.0 that I swapped in from the 91, makes a jingle or like a laboring noise, when excellerating. Sounds like it would if the timing was off. Since this has power packs and not a distribitor, just how do I try to adjust this? And what do I adjust ?
It took me 3 days to do the swap by myself with the hardest part of lining up the engine to the tranny. I was pating myself on the back till I saw all the antifreeze pouring out of the bottom radiator hose that I forgot to clamp. Lucky for me that my catch pan was under the car.
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From: Phoenix
I remember your previous post on this asking about the fit. Did you use all the controls devices off the 94 motor? Including the cam sensor? EGR is also needed. The 1994 PCM is looking for signals from these. Id you did install the cam sensor, this is apparently a tricky adjustment and could be throwing off the timing.
What kind of jingle. If you think the timing is off, is it pinging?
There is no timing adjustment. The crank sensor is positioned at 10 degrees BTDC. There is nothing that can be moved. There is an octane shorting bar, a jumper, in the wire harness. If this is remove, timing is retarded. It is located passenger side rear of engine compartment right with the rest of the diagnostic test ports.
What kind of jingle. If you think the timing is off, is it pinging?
There is no timing adjustment. The crank sensor is positioned at 10 degrees BTDC. There is nothing that can be moved. There is an octane shorting bar, a jumper, in the wire harness. If this is remove, timing is retarded. It is located passenger side rear of engine compartment right with the rest of the diagnostic test ports.
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Originally Posted by Jharger
I remember your previous post on this asking about the fit. Did you use all the controls devices off the 94 motor? Including the cam sensor? EGR is also needed. The 1994 PCM is looking for signals from these. Id you did install the cam sensor, this is apparently a tricky adjustment and could be throwing off the timing.
What kind of jingle. If you think the timing is off, is it pinging?
There is no timing adjustment. The crank sensor is positioned at 10 degrees BTDC. There is nothing that can be moved. There is an octane shorting bar, a jumper, in the wire harness. If this is remove, timing is retarded. It is located passenger side rear of engine compartment right with the rest of the diagnostic test ports.
What kind of jingle. If you think the timing is off, is it pinging?
There is no timing adjustment. The crank sensor is positioned at 10 degrees BTDC. There is nothing that can be moved. There is an octane shorting bar, a jumper, in the wire harness. If this is remove, timing is retarded. It is located passenger side rear of engine compartment right with the rest of the diagnostic test ports.
Yes I used all of the sensors from the 94 engine including the cam sensor.
Tell me more about the tricky adjustment!!!!!!
yeah, I guess it could be called a ping. just like if the distribitor is off a bit.
Thanks, Lara
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From: Phoenix
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Originally Posted by Jharger
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Hello, i have had a used 94 engine installed in my 94 explorer. The check engine light is coming on and the code is saying cam sensor. Is there a adjustment for this. My mechanic has tried everything he knows and now feels that I should have it taken to a Ford shop to have it looked at. I'll take any help I can get. Thanx
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Hobatch,
It's really not hard to set the CMP Sensor. You bring the engine up on TDC and then make a mark at 34mm or 1.34 inches (1 11/32 " ) ( 26 degrees ATDC ). After you make that mark, bring the mark up to the timming pointer. Then attach the POS lead of a digital volt meter to the center wire ( blue/orange ) and NEG to ground.
Turn the sensor counterclockwise til the meter reads battery voltage, then clockwise to 0 volts, then counterclockwise until the meter just enters the POS voltage side, like .01 volts or less.
Note: 26 degrees ATDC is on the opposite side of TDC from the 10 BTDC, about 34mm to the left of the TDC mark.
Note 2: If you have to replace just the sensor, just remove the two screws that hold it down onto the cmp drive housing and not the bolt that holds down drive housing.
You may have to remove the top intake to gain access to the cmp. On the 94 the sensor is kind of hard to get to.
It's really not hard to set the CMP Sensor. You bring the engine up on TDC and then make a mark at 34mm or 1.34 inches (1 11/32 " ) ( 26 degrees ATDC ). After you make that mark, bring the mark up to the timming pointer. Then attach the POS lead of a digital volt meter to the center wire ( blue/orange ) and NEG to ground.
Turn the sensor counterclockwise til the meter reads battery voltage, then clockwise to 0 volts, then counterclockwise until the meter just enters the POS voltage side, like .01 volts or less.
Note: 26 degrees ATDC is on the opposite side of TDC from the 10 BTDC, about 34mm to the left of the TDC mark.
Note 2: If you have to replace just the sensor, just remove the two screws that hold it down onto the cmp drive housing and not the bolt that holds down drive housing.
You may have to remove the top intake to gain access to the cmp. On the 94 the sensor is kind of hard to get to.
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From: South East Ohio Area
Ok, I adjusted the CMP Sensor, and my 94 Explorer still jingles on excelleration and doesn't have the power it should under load. I checked the timing and it seems to be running about 10-20 degrees BTDC and not right at 10. What else effects the timing?
Ps other than under load it runs great, the plugs are clean, engine doesn't smoke or leak, plus no airleaks.
Ps other than under load it runs great, the plugs are clean, engine doesn't smoke or leak, plus no airleaks.
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Bunch of stuff Laura. You're only going to see a fixed 10 degrees right at start up. After it's running, the PCM use the crank and cam sensors to control the actual spark curves. There are some table that go up to 30 degrees advance...depending on the rest of the sensor inputs.
If you disconnect the SPOUT jumper, you effectively negate the PCM influence. Then you can check your base timing of 10 degrees with the car running. If your SPOUT jumper is missing - large negative affect to performance. Also, if your spark advance jumper is missing, you loose another 5 or so degrees of advance.
If you disconnect the SPOUT jumper, you effectively negate the PCM influence. Then you can check your base timing of 10 degrees with the car running. If your SPOUT jumper is missing - large negative affect to performance. Also, if your spark advance jumper is missing, you loose another 5 or so degrees of advance.
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From: South East Ohio Area
Ok Guys I give up!
My 94 Explorer won and I have failed to solve this problem.
I'm still planning to swap in another motor, since moving to the Morgantown, WV area with all of the hills. I need my explorer running tiptop.
Ps I'm still getting 11 codes.
My 94 Explorer won and I have failed to solve this problem.
I'm still planning to swap in another motor, since moving to the Morgantown, WV area with all of the hills. I need my explorer running tiptop.
Ps I'm still getting 11 codes.
Lead Driver
Joined: Aug 2006
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From: Sand Lake, MI
We had a 91 4.0L that had unexplainable spark knock (ford dealer told me it was a common and sometimes uncorrectable problem with that model), someone suggested replacing the “mass airflow sensor” and it cured the problem and never returned.
Just a thought, Dan
Just a thought, Dan