Per the FSM, looks like it is NOT the feedback, definitely a 1945.
http://photos-d.ak.fbcdn.net/photos-ak-snc1/v2681/14/54/1024195730/n1024195730_30349235_2777425.jpg
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| Author: | 86slantram [ Wed Mar 11, 2009 5:07 pm ] |
| Post subject: | Chugging at high speed |
Lately my '86 has started what sounds like chugging or missing at rpms over 3000. I just swapped plugs and the 1 and 6 were mat black, while 2 thru 5 were fine. Idles smooth, timing is just a tick ahead of ten (per a seasoned Mopar mechanic) Any suggestions? Back story: '86 Ram D100 with what I am finding out to be a pieced together 1 bbl 225. I do occasionally have a sticky lifter, but it unsticks after a minute or two. |
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| Author: | 86slantram [ Wed Mar 11, 2009 6:36 pm ] |
| Post subject: | |
I forgot to mention, it does not always do this. Earlier today it was running awsome at speed. Went to work for 4 hours, came out and it was chugging again. |
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| Author: | ceej [ Wed Mar 11, 2009 7:22 pm ] |
| Post subject: | |
You have a tough one. Intermittent stuff is a bear. What 1 bbl are you running? Engine temperature? Being intermittent, fuel delivery, or an issue with the EGR maybe. Is it like a lean surge at cruise? (If you mash the throttle to the floor, does it go away for a bit?) CJ |
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| Author: | 86slantram [ Wed Mar 11, 2009 7:50 pm ] |
| Post subject: | |
What 1 bbl are you running? Engine temperature? Being intermittent, fuel delivery, or an issue with the EGR maybe. I assume I am running a stock 1945 holley. Temp seems just fine, although when it is cold (-0 and lower) it has a tendency to do it more often. |
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| Author: | 66aCUDA [ Thu Mar 12, 2009 6:16 am ] |
| Post subject: | |
Is this Detonation? Or Pinging? I had this problem when I went to a super six on my 87. I bought a NOS carb from Dan and it fixed the problem. Frank |
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| Author: | 86slantram [ Thu Mar 12, 2009 6:59 am ] |
| Post subject: | |
Could it be the sticky lifter not completely unsticking just sort of doing its job? and Cuda, how did the super six improve your 87? |
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| Author: | SlantSixDan [ Thu Mar 12, 2009 7:42 am ] |
| Post subject: | |
Is this '86 Lean Burn equipped? Does it have a regular #1945 or a feedback #6145 (with oxygen sensor in the exhaust manifold collector)? |
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| Author: | 86slantram [ Thu Mar 12, 2009 8:10 am ] |
| Post subject: | |
Per the FSM, looks like it is NOT the feedback, definitely a 1945. http://photos-d.ak.fbcdn.net/photos-ak-snc1/v2681/14/54/1024195730/n1024195730_30349235_2777425.jpg
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| Author: | KBB_of_TMC [ Thu Mar 12, 2009 9:38 am ] |
| Post subject: | |
I'd swap out the coil-to-dist ignition wire; I've had ones that caused problems like that intermittently even though they tested OK at other times; then I'd swap coils if it has more than 100K miles. |
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| Author: | 86slantram [ Thu Mar 12, 2009 10:00 am ] |
| Post subject: | |
I'll give it a try and post if it helps. |
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| Author: | slanted87 [ Thu Mar 12, 2009 11:53 am ] |
| Post subject: | chugging |
FYI- I had an intermittant hydraulic lifter type noise on my original engine that turned out to be a badly worn rocker arm. |
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| Author: | 66aCUDA [ Thu Mar 12, 2009 5:16 pm ] |
| Post subject: | |
15MPG over a Shot nonfunctional Lean Burn system...About 22 to 25 Mpg Hwy at 55. With the rear end in the truck anything over that and the mileage really drops. Frank |
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| Author: | 86slantram [ Fri Mar 13, 2009 7:49 am ] |
| Post subject: | |
66acuda- auto or 4 spd? |
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| Author: | 66aCUDA [ Fri Mar 13, 2009 7:54 am ] |
| Post subject: | |
904 Auto not the 727 Frank |
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