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Old 11-20-2001, 09:59 AM
William Toth
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Question 72 350 SL Loping Idle & No Power

We have a 72 350SL that has developed a loping idle problem and no power . The vehicle has 93,000 miles on it . We did a complete tune up , cap , rotor, points, plugs, wires, fuel filter . All of the parts were originals . The coil was also replaced , the tower had shorted badly to ground . Once the engine warms up it will idle but you can not accelerate at all , it begins to chug and miss . The fuel has been checked and is ok , firing lines on scope appear to be fine . We are not familiar with the transistorized module in the left fender well . What are the simptoms when it is going bad??? Also is there a way to check the on board computer. Can we also purchase parts from you ?? Everyone in the shop is pulling their hair out on this one , including the customer who calls regularly. Any help would be greatly appreciated on this one .



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Old 11-20-2001, 10:58 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
IF you are a tech or owner of the shop, you can now send an e-mail to the and get a pass to go to the TECHS ONLY forum.

That said, I would check the vacuum hose that goes to the manifold pressure sensor.

Also, be sure to check the trigger points that are under the distributor housing. There is 4 sets of points that trigger the injectors and the will get wet with oil. If so, clean them and dry them to see if it helps.

Donnie Drummonds
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