Started a thread about a year ago trying to help a work friend out with an acquired delorean by another friend with some issues. Working on it has been hit or miss although we are back at it after the owner finally got some of the parts we knew were issues. I feel we have learned much and although a former auto tech I had never messed with the types of systems on this car. With that said, I wanted to get a fresh start with some questions. The older post can be visited here:
Anyways, after several repairs to try and get the car back to somewhat in working order we have confirmed the following:
-CSV system is operating normally after repairs
-ICS is operating although I question why we are only seeing 650 rpms as I understood it should be around 750. Before this was running much higher and we found the mechanical rigging off. Also had a bad thermistor.
-Repaired several vacuum leaks. (I didn't even think about checking injectors for air leaks and that will be next)
-Adjusted valves
-Repaired the warm up circuit melted wires controlling the fuel pressure.
Where we are at is last night we checked/set timing to 13 degrees. It was at about 16 degrees. Now it is quite boggy and backfires/gurgles with a quick throttle hit. We went off the number one cylinder (back cylinder RH side of car) and used the what I would call more of the middle mark. I read somewhere that this mark would be if taking spark from the #6 cylinder although I question if this is accurate and against anything I had done in the past. The car still appears to be very rich when cold due to the fumes being created from the exhaust. We also double checked the idle air mixture setting with a dwell meter. I question if we are having an issue here as any changes to the mixture screw did not make much of a difference in dwell reading of around 30. (see attached) Every now and then you would get a bit of fluctuation. I could have sworn that when we checked this previously we could get more significant changes and the reading was much higher.
I question if one of the things we should check is fuel pressure difference of the regulator. Looking for some advice of where to go next as I am at a bit of a loss.
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