|
1990 Mercedes-Benz 420SEL 4.2L Poor Idle Quality, Misfire
engine has a slight rough idle since cylinder heads were rebuilt. in gear there is the occasional misfire. #7 spark plug is consistently black as from too rich a mixture as compared to other plugs which are a light brown colour. spark plugs, wires, cap & rotor...
Summary posted 8/8/2001
iATN Members:
Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle 9 Replies Received (View Replies)9 Replies Received (Hide Replies)
|
Message Closed w/Summary
|
9 Replies Received
9 Replies Received
Related Documents & Media | VIN | WDBCA3506L |
| Engine | 4.2 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / CIS-E |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Idle |
Message Closed w/Summary
Vehicle Data
1990 Mercedes-Benz 420SEL
| VIN | WDBCA3506L |
| Engine | 4.2 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI / CIS-E |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Idle |
Video