jsw8671
New member
- Joined
- Jul 14, 2016
- Location
- Central Ohio
Howdy! I was wondering if I could get some help with my '84 244. It has recently developed a surging (stalling, lack of power) problem when driving. It idles great, and runs/accelerates fine when driving at low speeds, but when cruising on the freeway, after a while it starts surging and progressively gets worse to the point of having to pull over. It will idle fine without being restarted though, and still accelerates fine at lower speeds.
Extra details: LH Jetronic 2.0. I previously had to jump the fuel pump relay (terminals 30 to 87) with a switch due to it not activating on its own (points to a problem with the ignition switch or junction box I believe). The system relay (right next to fuel pump relay which connects to the MAF, Lambda tester, and control unit) was having intermittent trouble and would have to be occasionally disconnected (then re-connected) to get the car to start. This relay (system relay) was rapidly switching on and off while the car was 'stalling' and in order to get home I jumped terminals 30, 86 and 87. This reduced the problem, but after several miles of driving I still ended up with random/intermittent loss of power, though with less consistency and shorter duration.
I noticed that there is a function within the control module that shuts off fuel during engine braking (via greenbook). Perhaps whatever is responsible for this information is faulty? I have no idea what that would be though.
Plugs, wires, cap, rotor, and air filter are all about a month (or two) old. Thermostat in the air-filter box is removed (extra intake hose added). All vacuum hoses are intact, and I thus far have not managed to track down a vacuum leak via hose inspection or propane application.
Where should I be looking? I have a few hundred miles of driving ahead of me over the next couple days, and I'm not at all confident that she'll make it at this point...
Extra details: LH Jetronic 2.0. I previously had to jump the fuel pump relay (terminals 30 to 87) with a switch due to it not activating on its own (points to a problem with the ignition switch or junction box I believe). The system relay (right next to fuel pump relay which connects to the MAF, Lambda tester, and control unit) was having intermittent trouble and would have to be occasionally disconnected (then re-connected) to get the car to start. This relay (system relay) was rapidly switching on and off while the car was 'stalling' and in order to get home I jumped terminals 30, 86 and 87. This reduced the problem, but after several miles of driving I still ended up with random/intermittent loss of power, though with less consistency and shorter duration.
I noticed that there is a function within the control module that shuts off fuel during engine braking (via greenbook). Perhaps whatever is responsible for this information is faulty? I have no idea what that would be though.
Plugs, wires, cap, rotor, and air filter are all about a month (or two) old. Thermostat in the air-filter box is removed (extra intake hose added). All vacuum hoses are intact, and I thus far have not managed to track down a vacuum leak via hose inspection or propane application.
Where should I be looking? I have a few hundred miles of driving ahead of me over the next couple days, and I'm not at all confident that she'll make it at this point...