|
|
|
#1
|
|||
|
|||
Ignition checks for 70 MB 250 w/114 engines
I have a 70 250 that recently has shown signs of what I have taken for ignition break down (coughing, missing in light to moderate acceleration & disappearing in moderate to hard acceleration) Now it has progressed to where it hardly runs ( major coughing & backfiring possibly thru carbs). Thank-you to M.B. Doc for the spark plug update. The compression test for cyl.1-4 were 175-180 lbs. with spark plugs showing light-medium brown deposits, cyl. 5&6 were up @185lbs. (possible slight carboning up) with the plugs wet & blackish. I have replaced the plugs, cap, wires, coil & points (rotor was B/O). It still runs like brick out house. points gapped @ .012", plugs gapped @ .020" My ignition utilizes a coil w/ neg. terminal going to ground, 2 resistors, a transistorized ignition control box and a distributor w/ points. I believe it to be a version 1 type transistorized ignition.
Can anyone tell me how to test the ignition control box or any other tests to cure this problem I'm having? I have been thinking of putting in an after-market electronic ignition w/photo-electric pick-up to eliminate the points, can anyone advise me (pro or con) on this idea? |
#2
|
|||
|
|||
First of all the point gad is too close. .016-.017 it the correct setting.
|
#3
|
|||
|
|||
I should have read the rest of your post but the plug gap is also wrong it should be .028" gap.
|
Bookmarks |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
1972 250 ignition questions | dang50 | Vintage Mercedes Forum | 2 | 01-05-2004 02:44 PM |
Points to electronic ignition - 1972 250 | rgnprof | Vintage Mercedes Forum | 8 | 05-20-2003 06:34 PM |
spark plugs for a 1970 MB 250 w/114 engine | sleekauto | Tech Help | 1 | 08-06-2001 06:07 PM |