1982 dodge B250 van, 3/4 ton, 318
Question: can the ignition timing mark change location over time with wear and tear (I don’t really mean can the grooved mark move but not sure how to word this)? 12 degrees advanced gives low vacuum (about 16, should be 20-22) and vehicle lags and struggles to start. Is it possible that the new distributor is bad or installed wrong? Please read recent history below and any suggestions are much appreciated!
problem 1: van wouldn’t start after running for a while. needed to cool down then would fire up.
Solution1 : mechanic replaced just the distributor pick up. I watched him do it and he never loosened or removed the distributor. when first started it ran terrible. timing was way off. Mechanic earballed the timing and the pickup gap and it was never right
Problem 2: van would only start if I over advanced the timing. I would then retard it slightly for cruising but didn’t seem to hold timing well.
Solution 2: new mechanic adjusted timing with timing light to 12 degrees advanced and properly set the gap. Ran great for about 1 hour then started pinging again.
Problem 3: could not get the timing to hold. I bought my own timing light and discovered that the ignition was 25 degrees advanced but I could see the timing mark that the mechanic made at 12 degrees and called to confirm that they adjusted properly.
Solution 3: another new mechanic replaced the distributor completely and earballed the timing. next day still wouldn’t start, had to advance timing to get it running. mechanic then bypassed voltage regulator in ignition switch during starting (probably bad lingo here) and this significantly helped but still not running right.
Problem 4: van just not running right. only getting 10 mpg, used to get 16mpg! it sounds like it is missing, still has problems starting. Timing is definitely still a problem. sometimes it will start when I release the ignition.
Solution 4: I reset the timing to 12 degrees advanced. While running it sounds pretty smooth but I have low vacuum and power loss. I tweaked and advanced a little more but still struggles to start and doesn’t run very well. There seems to be excessive vibration too.
Have a VANtabulous day! Thanks!