Think the IC pump matters?
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 2,566
Likes: 7
'14 ML BT
Think the IC pump matters?
I recently installed an ASP pulley which exacerbated the pump problems that were a "pre-existing condition."
I started out by data logging with a ScanTool after the pulley install. The data reflects 51 degree ambient temp, coolant temp 183 or so, and intake air temps starting at 150 degrees F.
The first hard acceleration up to 115 mph drives the IAT up to 250F, where the supercharger shuts down and the acceleration goes flat. I can't get more than 1 passing gear kickdown without losing power after an all too brief burst of speed.
This previously happened only after 2 or 3 runs in ambient temps over 100F.
So I take in to the dealer, show the data log to the shop foreman and urge him to drive it and feel the power loss.
2 days later I pick up the car, they've replaced the pump with another MB pump.
Going out the door, the data logging shows the IAT at 81 degrees in 40 degree weather. Then when I put my foot in it on 3 seperate runs over the next 5 minutes, the IAT never exceeds 115 degrees F despite doing 105 and at points over 6,000 rpm's.
It never lost power. I think I'm gonna' like this car.
I started out by data logging with a ScanTool after the pulley install. The data reflects 51 degree ambient temp, coolant temp 183 or so, and intake air temps starting at 150 degrees F.
The first hard acceleration up to 115 mph drives the IAT up to 250F, where the supercharger shuts down and the acceleration goes flat. I can't get more than 1 passing gear kickdown without losing power after an all too brief burst of speed.
This previously happened only after 2 or 3 runs in ambient temps over 100F.
So I take in to the dealer, show the data log to the shop foreman and urge him to drive it and feel the power loss.
2 days later I pick up the car, they've replaced the pump with another MB pump.
Going out the door, the data logging shows the IAT at 81 degrees in 40 degree weather. Then when I put my foot in it on 3 seperate runs over the next 5 minutes, the IAT never exceeds 115 degrees F despite doing 105 and at points over 6,000 rpm's.
It never lost power. I think I'm gonna' like this car.
