Salutations everyone, For anyone curious, I've been attempting to fix a BMW that we owned for almost 12 years. About three years ago (2022), it unexpectedly died, and my dad attempted to fix it but forgot. He parked it in our front yard, where it has remained for the last three years. I began working on it in October, but with my part-time job and school responsibilities, I don't have much spare time. Here are the components and fixes that I have applied thus far. Although the number on the body is 200k, the engine mileage is closer to 37k, because my uncle installed a new engine when it was previously owned by him.
Initial symptoms before to undertaking any task:
• Inactive
• Vibrations in the engine • Fluttering-like unstable RPMs
• Pressing the throttle completely causes it to not rev past approximately 1500 RPM. • Starting from scratch (different attempts)
After around five to eight minutes of running, the car would finally calm down, but it would still run and idle poorly.
Current tasks (in chronological order): • Fuel pump replaced
• Put in four brand-new spark plugs from Bosch performed a plug-and-unplug test on the coils • Took off the airbox, changed the air filter, and used WD-40 electrical contact cleaner to clean the MAF sensor.
• Took out the VANOS solenoids, cleaned them using WD-40 contact cleaner, and put them back where they came from.
The vehicle was operating (roughly, but running) before VANOS was cleaned.
Following your VANOS cleaning: • Cranks, but won't start, engine • Cranked normally at first, but after a few tries it started cranking more slowly; I suspect the battery was dying since the dash began to flutter as it was cranking very slowly, and finally it stopped cranking altogether.
Further details: • Although it has been removed, the battery was first run with the transit vent plugs still installed, even though it is just a couple months old. • A wall charger has been used to charge the battery. MAF was given ample time to air dry before being reinstalled; following the reinstallation, it ran smoothly. There are a few irrelevant codes that come up in the OBD scan, but nothing that specifically mentions VANOS. The VANOS connectors are correctly inserted. • Now I'm not entirely certain that this is the problem, but I cleaned the VANOS solenoids and, in my foolishness, didn't wait for them to dry before putting them back in. However, after doing some more research, I found that this might not be the case.
What are the questions? Can cleaning VANOS solenoids cause a complete lack of starting? Is it possible that the WD-40 contact cleaner completely ruined the VANOS solenoids? Now what am I supposed to do or verify?
Struggling to find the problem methodically while avoiding tossing parts at it. Please provide whatever guidance you can. If anyone is interested in seeing images or videos of the travel, I have chronicled it quite a bit. Just let me know!