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Old 02-18-2010, 11:49 PM
grandwag89's Avatar
grandwag89 grandwag89 is offline
Grease Monkey
Join Date: Feb 27, 2009
Location: Owensboro, KY
Posts: 391
Exclamation Need engine help!

OK, so here's the low-down on my '89 Wagoneer with the 360: I absolutely don't know what to look for on it. When I start it cold, it runs rough at first like it's flooded a little, no biggie, just stay on the gas a little and it clears right up. While it's cold, I can rev the snot out of it with little cutting out, but I also have the driver's manifold off and the AIR bolts out on the other side, so it doesn't have the back pressure. When it's warm, it starts missing really bad and if you try to rev it it backfires really bad. Other info I have is that with the wide open exhaust I see that every time it misses, fire shoots out from #5 and #7. Any ideas? Any and all help is much appreciated.
1989 Grand Wagoneer: 360/727/229, D44 F&R, 3.31, 125K
1983 J20: 360/T18A/208, D60FF/D44HD, 4.10, 193K
1980 Ford F100: 302 2V/C4, 9", 2.75, 180K
1992 Ford F150: 302 EFI/M5OD, 8.8, 3.55, 300K
1995 Chevrolet C2500: 350 TBI/4L60E, 14 Bolt, 3.42, 315K
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Old 02-19-2010, 12:05 PM
HARDCORE pacer's Avatar
HARDCORE pacer HARDCORE pacer is offline
Master Mechanic
Join Date: Feb 07, 2005
Location: usona alberta
Posts: 877
Timing either ignition or valve.
78 pacer on 75 chero frame thats shortened 10\" and shackle reversal, D60 front with spool,14ff with detroit locker 4.56s in both,500 hp/500 ftlb torque 401,built 727,208 to divorced 205 doubler,on 46x21 ag tires
78 cj 360, 3spd, scout 44s with detroits SOAed with 36"tsl and beadlocks
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Old 02-19-2010, 12:20 PM
rockin wagoneer's Avatar
rockin wagoneer rockin wagoneer is offline
Join Date: Jan 02, 2010
Location: Oak Ridge, TN
Posts: 216
sounds like timing is off to me or your running really rich.
love it,live it,be it JEEP!!!!

79 cherokee- dd on 36s

78 wagoneer-rebuilding
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Old 02-19-2010, 12:33 PM
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diazj diazj is offline
Join Date: Oct 05, 2009
Location: tx panhandle
Posts: 71
both my 76 and 83 did that when i got them i rebuilt the carbs found crap in the needle and they run smooth now
76 wagoneer needs
83 wagoneer for sale
1988 pace arrow home
1979cx500custom honda
2007 harley sportster
2003 nissan frontier 4x4 SUPER CHARGED
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Old 02-19-2010, 12:34 PM
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Highflyr Highflyr is offline
Join Date: Jan 26, 2010
Location: Maryland
Posts: 119
I'd put the manifold back on before you ruin the valves. I ran a 460 Ford with no exhaust manifolds and warped and basically distroyed every valve in the engine. I also agree with everyone else that the timing is off or it's running rich.
1977 Wagon, 360, TH400, QT, D44s, 3'' Rancho lift, 32x11.5x15
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Old 02-19-2010, 12:39 PM
Mr Haney's Avatar
Mr Haney Mr Haney is offline
Join Date: Mar 19, 2005
Location: INdiana
Posts: 109
what they said plus spray choke cleaner around to find vacuum leaks.
Mr. Haney----- Ive owned 15 or so of these Jeeps-----definitely Love/ Hate relationships!
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Old 02-19-2010, 04:53 PM
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caionneach caionneach is offline
350 Buick
Join Date: Aug 19, 2003
Location: Monroe, Louisiana
Posts: 1,016
When was the last time you changed spark plug wires on it? A new set can only help.
1982 Cherokee
258 cid/T-5 $15 Sunpro Voltmeter gauge
replacement; Quadratec Trailmax Thermal Pro
Seats! 4 inch SKYJACKER suspension lift, 33X12.5 in
BFG Mud Terrain Tires on 15X10 in ProComp Rims.
New BJ's chrome-moly rear axle shafts, 3.73:1 diffs and ARB Air Locker!
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