Ignition problems
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New User
Joined: Jul 2003
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From: Country
Ignition problems
I recently did a swap. I put a 400 from an 82 E250 2wd into my 78 F150, which had a 351M. I retained the 351 distributor in the 400. I also kept the carb from the 351. Problem is it does not run correctly. No power really ugly mileage. The timing is correct. when installed I put in a new timing chain and gears, plugs, pickup coil, coil, plug wires, cap and rotor. I have been told by parts dealers there is a differance between the ECUs and that there isn't. Help any suggestions?
New User
Joined: Jan 2008
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Ignition problems
Welcome to FTE!
Please read this
https://www.ford-trucks.com/forums/s...hreadid=102632
If you still have the original dizzy in the newly re-built 400, it should work.
You need 3 things;
Air
Fuel
Spark at the correct time.
Are you sure the rotor is pointing at the proper spot ?
Have you tested the Ignition module ?
Please read this
https://www.ford-trucks.com/forums/s...hreadid=102632
If you still have the original dizzy in the newly re-built 400, it should work.
You need 3 things;
Air
Fuel
Spark at the correct time.
Are you sure the rotor is pointing at the proper spot ?
Have you tested the Ignition module ?
Thread Starter
|
New User
Joined: Jul 2003
Posts: 2
Likes: 0
From: Country
Ignition problems
Air good
Fuel Good
Spark checked and it is OK.
Dstributor pointing in the correct direction. Out of the 351. But I do have the one from the 400.
Timing set at 3% BTDC For the 400 it could be from 12 to 3 and I have tried all of the above.
Tweeking the fuel mixture helps but very little.
Is there a difference in the Timing Chain and gears.
Fuel Good
Spark checked and it is OK.
Dstributor pointing in the correct direction. Out of the 351. But I do have the one from the 400.
Timing set at 3% BTDC For the 400 it could be from 12 to 3 and I have tried all of the above.
Tweeking the fuel mixture helps but very little.
Is there a difference in the Timing Chain and gears.
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Ignition problems
Those dizzies are inter-changeable.
I think you're off with timing though.
Set it at 12* BTC with vacuum advance hose removed and plugged at 650 rpm
Have a look at the calibration codes and specs in the thread at the top of this forum, to figure your timng.
I think you're off with timing though.
Set it at 12* BTC with vacuum advance hose removed and plugged at 650 rpm
Have a look at the calibration codes and specs in the thread at the top of this forum, to figure your timng.
Senior User
Joined: Jul 2003
Posts: 165
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From: St. Louis, MO
Ignition problems
Have a look at the calibration codes and specs in the thread at the top of this forum, to figure your timng.
