Hello All,
I have read alot of threads regarding this and have checked alot of this out.
89 300E, 62K, regular service:
Car started hard, need to give it gas to keep it running. Then once I put it into gear it wants to stall. Once it was running, say a mile or so, car was fine. I started having this problem when my dumb head put 87 octane in it. Since then I have ran cleaner and 5 tanks of 93. Still was happening. So I checked the car out. New plugs, distributor and rotor, checked plug wires - fine. Then I noticed that the vacuum hose was pulled from the fuel regulator valve, hose that goes from rubber house of air cleaner housing to valve cover. Reconnected that. Now when I start the car it runs real rough, shaking at idle and at 3000 RPM for a minute then once I take off smooth. But when I come to a stop, it idles a little eratic, 500 - 700 rpm, almost like the AC is kicking in, but it is not. I then came home and checked the OVP. I unplugged it and started the car. Car Started the same as it did before when hot, but cold start I couldn't get it started. Plugged the OVP back in and the started cold and started but same as the above problem. I then notice that the CO adjust on top of the throttle body, the long aluminum column that goes up into the air cleaner housing, had some weird drill marks near the top. The housing itself has a crack in it. Does air come in this housing or is it just for the hex screw adjust. When I put a hex down it it pushes down on the butterfly but I can't seam to turn the screw. What size hex is this?
Anyway, it seams to get worse with the more days that go by. Definetly worse once I repluged in the vacuum to the fuel regulator.
Any suggestions will be appreciated. I will post the solution once I find it also. thanks
I have read alot of threads regarding this and have checked alot of this out.
89 300E, 62K, regular service:
Car started hard, need to give it gas to keep it running. Then once I put it into gear it wants to stall. Once it was running, say a mile or so, car was fine. I started having this problem when my dumb head put 87 octane in it. Since then I have ran cleaner and 5 tanks of 93. Still was happening. So I checked the car out. New plugs, distributor and rotor, checked plug wires - fine. Then I noticed that the vacuum hose was pulled from the fuel regulator valve, hose that goes from rubber house of air cleaner housing to valve cover. Reconnected that. Now when I start the car it runs real rough, shaking at idle and at 3000 RPM for a minute then once I take off smooth. But when I come to a stop, it idles a little eratic, 500 - 700 rpm, almost like the AC is kicking in, but it is not. I then came home and checked the OVP. I unplugged it and started the car. Car Started the same as it did before when hot, but cold start I couldn't get it started. Plugged the OVP back in and the started cold and started but same as the above problem. I then notice that the CO adjust on top of the throttle body, the long aluminum column that goes up into the air cleaner housing, had some weird drill marks near the top. The housing itself has a crack in it. Does air come in this housing or is it just for the hex screw adjust. When I put a hex down it it pushes down on the butterfly but I can't seam to turn the screw. What size hex is this?
Anyway, it seams to get worse with the more days that go by. Definetly worse once I repluged in the vacuum to the fuel regulator.
Any suggestions will be appreciated. I will post the solution once I find it also. thanks