(The continuing story of “My car won’t run when its warmed up”)
I bought my 67 250 SL from a friend who had spent considerable time and money trying to get it to run.
I figured sooner or later, some small anomaly would show up and prove to be the cause. When I bought the car, my friend had paid $3000 to have a full “tune up” done which included the usual items, to no avail then a checking of the fuel tank and a freshly remanufactured fuel distributor/pump from Pacific Fuel injection.,….none of it worked……..the car would drive for about 15 minutes then begin running progressively worse and shortly would die and not restart until it completely cools off.
A shot of starting fluid in the intake and it would start and run for a few seconds,……….so,…..it was definitely a fuel issue.
So,…………..I read the tech article and decided to drain the fuel tank and check the strainer,………seemed OK,………..it didn’t look like a big deal so I went ahead and dropped the fuel tank then confirmed that all the fuel return lines into the tank and forward were clear………..they were,I could blow compressed air through them.
So, since the car had already been converted to an aftermarket fuel pump with an integral filter,………I went ahead and replaced it and all the related fuel hoses at the back of the car…..just figured I was already down there and it was cheap insurance.
Net result,…………….No Change!
I then Read through the article on how to adjust the throttle and injection pump rods so that the fuel injection arm and the throttle arm both hit their full stop positons at the same time.
Turned out that the throttle stop had been adjusted previously,…..so that it was open instead of at the “Sticks Slightly” position,….so I corrected that by lengthening the throttle rod about ¼” and checked for proper synchronization……….spot on.
I was hoping that would turn out to be the problem,………….AND, the car did start easier and run better than before…………….BUT
AFTER A FULL WARM UP AT IDLE AND TWEEKING THE IDLE AIR SCREW FOR THE BEST IDLE ,…..JUST WHEN I THOUGHT I HAD IT FIXED, I DROPPED THE HOOD, JUMPED IN, BLIPPED THE THROTTLE IN PREPARATION OF DRIVING OFF,……..IT DIED,…. IT RESTARTED, BUT DIED IMMEDIATELY AND WOULD NOT RESTART.
Following the suggestions in the technical article, I turned the brass idle fuel mixture clockwise first 2 then 4 clicks clockwise to enrichen the mixture,........but no change,...I returned The idle fuel to the original position and even tried counterclockwise (leaner) two clicks..............no good,...still would not start.
Just to check things, I let it cool down for 4 hours this afternoon after I made the latest adjustments. As usual, it fired up fairly quickly and I drove it for about 15 minutes then it started to start running poorly so I hot footed it back to the house.
I CLEARLY STILL HAVE A FUEL STARVATION PROBLEM ONCE THE CAR REACHES FULL OPERATING TEMP.
I NEED HELP ON WHAT TO DO NEXT. Any suggestions?
THANKS IN ADVANCE,
BRIAN COLLINS
Brian
