Originally Posted by
oledoc2u
Wow....why try to look at other problems when the symptoms are that of a bad CPS. The problem with aftermarket parts are most aren't up to factory specs. Other makes and models have CPS problems as well. Just put one in my Tahoe although a '99, they will finally wear out. Bosch parts work in these cars, other do not. Some one might get lucky, and an aftermarket may work, but not often, and not worth the risk. CPS problems can be hard starting, rough idle, making it seem the throttle isn't responding. Dying for no reason. If the throttle truly isn't working, then it could be the throttle position sensor. But it ran for a few weeks, so I doubt that to be an issue. Believe me, there are days I wish for a car without any sensors or fuel injection, or anything other than old fashion mechanical. Then, I remember, replacing points, accelerator pumps, plugs, coils, voltage regulators, and such, so as they say, **** happens.....
Worth noting, the guy I was speaking with at Mercedes yesterday was saying that there was a recall on the OEM CPS recently.... so, if you bought a part two years ago, there's a good chance it's a dud (or will fail just like the other one did). He said unfortunately, many dealers liquidated their old stock to smaller vendors, so the "genuine" articles we're buying on eBay may not be the latest & greatest.
This was all discussed as I was trying to help him diagnose the idle issue on the car I just sold... When I was telling him everything I replaced, he asked about the CPS. I told him I changed it in May, he said "where did you get it?" and I told him the forum. That's when he shared the above information with me.
Take it with a grain of salt... but in this case, buy the current-level stock from a dealership you trust... not eBay.
Cheers,