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Post by 89turbolx on Apr 7, 2009 20:35:00 GMT -5
I unplugged the spout connector, set my timing to 10degs BTDC, plugged in my spout, timing stayed at 10degs. Reved up motor and timing seemed to retard, not advance. Normal? I ohmed my wire from the TFI module to my computer, is good. Swapped PCM's, same effect. What about the knock sensor having an effect? What advances the timing? TFI module? Also I bumped up the timing to 18degs, drove it and the A/F gauge did go lean in 1st and 2nd gear, but was fine in 3rd and 4th at WOT running 15 psi boost. When I brought it back in the shop to increase boost, I saw that my header was really hot, red hot near the turbo. It did cool back down after letting it idle for about 5 mins. Normal? I wouldn't think so.
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Post by Stinger on Apr 8, 2009 2:00:43 GMT -5
Is the timing moving "up" the timing marks towards the passenger side of the car when the spout is plugged in or engine is revved?
Sounds like your spout connector is getting a bad connection.
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Post by 89turbolx on Apr 8, 2009 7:29:57 GMT -5
No, it moving in the retarding direction. What about the knock sensor? If I remember right, in the beginning I did have a code for it. If I still have a knock sensor code, will that keep the computer from advancing the timing? I'll try to run codes today. With the header getting so hot, is that due to the engine running too lean?
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Post by Stinger on Apr 8, 2009 12:26:43 GMT -5
The header can get excessively hot from being lean or having improper timing.
Timing moving towards the passenger side IS the retarding direction. Can you clarify which direction it is moving?
You can unplug the knock sensor and see if it helps. Don't drive it that way though.
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Post by 89turbolx on Apr 8, 2009 15:01:15 GMT -5
If your looking at the engine, standing in front of the car the timing mark rotates to the driver's side( clockwise). It turns about 5 or so degs. I did unplug the knock sensor, it did not change. I'm going to check my wiring from the knock sensor to the PCM, and see if that's ok. What are your thoughts on wraping the header up with header tape?
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Post by Stinger on Apr 9, 2009 2:04:45 GMT -5
The knock sensor won't move timing past base timing. Matter of fact, I can't think of anything that will. I'll have to do some research on this one. Does it do this when you just plug in the spout or only when you rev it?
Don't wrap the header.
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Post by 89turbolx on Apr 9, 2009 6:06:27 GMT -5
Unplugging the spout or plugging it in does not change timing, it stays where you set it. Only reving it will move it. I set it to 18 degs like I said and drove it last night, doesn't run well. Back fires alot, going by my gauge, is running leaner just crusing or giving it gas gauge drops off. Have to go under boost to get the gauge to come up. Should I remove the timing cover and ck if my belt slipped a tooth or make sure its all lined up?
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Post by Stinger on Apr 9, 2009 12:11:44 GMT -5
You should make sure your spout is getting a connection. Sounds to me like it's not. By checking I don't mean make sure it is plugged in, I mean use a ohm meter to verify it is connected.
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Post by 89turbolx on Apr 9, 2009 15:25:06 GMT -5
I did. I plugged the spout in and ohmed my wire from the PCM to the TFI module, .3ohms. I guess on monday I will pull the timing cover off and ck the time belt.
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Post by Stinger on Apr 9, 2009 23:10:37 GMT -5
You don't have to pull the cover to check the timing belt. There is an inspection plug over the cam timing pointer. Just line it up, then see if the crank is at 0 degrees.
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Post by 89turbolx on Apr 13, 2009 20:01:10 GMT -5
I pulled off my timing cover to ck my timing. All lined up. Removed my distubutor to ck the gear and made sure it was lined up on #1 cylinder, and it was and the gear was good. So when the spout in connected and the computer advances the timing, what actually does it? The coil? TFI module? Would my MSD box effect anything with timing? I didn't want to disconnect the MSD box if it didn't matter.
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Post by 89turbolx on Apr 17, 2009 21:49:25 GMT -5
Checked my wiring from all sensors to the PCM, including the knock sensor, all checked good. How can I test my TFI module and my distributor? I guess thats my next part to throw at it.
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Post by Stinger on Apr 19, 2009 23:00:24 GMT -5
Testing a TFI is quite difficult because they rarely fail until they are hot. The easiest way is to drop a known good distributor and TFI assembly into it. Codes will be thrown if either is bad though.
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Post by 89turbolx on Apr 24, 2009 21:07:06 GMT -5
well I drove the mustang today and now I guess I'm right back to square one. I have done nothing but check wiring and today the car is running just as it was when it started back in Jan. If I go under any boost the A/F drops off lean and bucks, jerks and has no power. I had to set the timing at 25 deg (last week), so it would at least run some what alright, backfires alot on decel. So now what? I'm ready to set it on fire and roll it down the hill!!
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Post by Stinger on Apr 24, 2009 21:43:52 GMT -5
Where are you located?
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