Timing problem
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New User
Joined: May 2006
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Timing problem
Hey guys,
Trying to set the timing on my '86 f150 5.0. First off, the timing mark doesn't come anywhere near where it's supposed to. With the timing light, I can see it from underneath the car, but not above, where it's supposed to be.
Then, after disconnecting the spout and messing with the distributor postition a bit, I finally get what seems like good timing, (I have an engine vacuum gauge and the needle is steady in the green "normal" zone) I reconnect the spout and get a problem with the rpms sweeping low and high.
The truck didn't pass smog because of a couple of vacuum hoses (I reconnected them) and the timing was at 17 degrees. Will it pass smog without the spout connected, or do I have to put it back, and if so, anybody have any ideas as to what may be causing the sweeping rpm's?
Any help is appreciated, thanks.
Trying to set the timing on my '86 f150 5.0. First off, the timing mark doesn't come anywhere near where it's supposed to. With the timing light, I can see it from underneath the car, but not above, where it's supposed to be.
Then, after disconnecting the spout and messing with the distributor postition a bit, I finally get what seems like good timing, (I have an engine vacuum gauge and the needle is steady in the green "normal" zone) I reconnect the spout and get a problem with the rpms sweeping low and high.
The truck didn't pass smog because of a couple of vacuum hoses (I reconnected them) and the timing was at 17 degrees. Will it pass smog without the spout connected, or do I have to put it back, and if so, anybody have any ideas as to what may be causing the sweeping rpm's?
Any help is appreciated, thanks.
Senior User
Joined: Sep 2005
Posts: 252
Likes: 0
From: Illinois
Maybe your harmonic balancer slipped. That could explain why your timing mark is showing up on the bottom.
I don't know if you will pass emissions with the sprout unplugged. I would doubt it, though.
I have an 86 F-150 w/ 5.0 and the idle surges like you describe. The IAC motor could be the culprit. I have removed and cleaned mine a couple of times and it seemed to help for awhile. But, it always seems to go back to surging.
I don't know if you will pass emissions with the sprout unplugged. I would doubt it, though.
I have an 86 F-150 w/ 5.0 and the idle surges like you describe. The IAC motor could be the culprit. I have removed and cleaned mine a couple of times and it seemed to help for awhile. But, it always seems to go back to surging.
