Aruba Posted August 4, 2011 Report Share Posted August 4, 2011 Polo 1.4 CL. 5 door hatchback APQ engine 1999 35,000 miles Problem Bad tick over and smells rich Only doing 25 miles to the gallon Plug black on no 4 cylinder New parts Plugs HT leads Distributor cap Rotor arm Throttle body Various machines have failed to find the fault, so I took it to VW main dealer in Portsmouth who had it for 10 days and eliminated possible faults with: Ignition system. Fuel system. (injectors and their spray pattern. Fuel pressure) Lambda sensor, emissions Cylinder pressure check done all cylinders, all pass. Including no.4 that also passed leakage test. They could not find what was wrong and wanted to strip the engine to examine the valves. I declined their offer (£££) as I cannot understand how it is a valve issue as it passes a pressure test and there is no noisy tappet to suggest error in no.4 valve clearance. Any one got any other ideas I could try? Or am I mistaken on the valve issue. Link to comment Share on other sites More sharing options...
Aruba Posted August 16, 2011 Author Report Share Posted August 16, 2011 At last the problem is solved. It was two dodgy followers (hydraulic tappets) on no 4 cylinder, worn concave quite a bit. replaced the lot for £85 Sounds good now. bloody shame the garages couldn't have found that with their plug in gadgets. Link to comment Share on other sites More sharing options...
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