My vision of heaven is to sort out a lumpy idle and a flashing orangeEML light.
I started out with a new exhaust as the old one was leaking at the flexible joint and the rear box was shot. Did not improve the uneven tickover. Since I had recently fitted new plugs, leads and coil after a garage suggestion, I bought a newer and better OBD2 scanner (Topdon AL400) and checked the pre and post o2 sensors. Both passed. Still no DTC's though. Checked the MAP sensor in the air intake, cleaned it with a non residue contact spray. Refitted but no better. Bought a new sensor since they are cheap and quick to fit. No better. My mind started to think there might be a blown gasket between 2 adjacent cylinders, so sent off for a pressure tester kit which arrived today. I was relieved to find all cylinder pressures between 244-250 PSI so I guess the head gasket is fine. There is no sign of any oil in the coolant. What next? Could the injectors (around 82000 miles use) give a lumpy tickover but fine as revs mount?? I see it costs around £50 + postage to send them away for cleaning and testing but not much more for the cheaper new injectors.
Or do I give up and phone a good auto elecrician. There can't be much more to check! At least I have a few more useful tools for my other cars!
I started out with a new exhaust as the old one was leaking at the flexible joint and the rear box was shot. Did not improve the uneven tickover. Since I had recently fitted new plugs, leads and coil after a garage suggestion, I bought a newer and better OBD2 scanner (Topdon AL400) and checked the pre and post o2 sensors. Both passed. Still no DTC's though. Checked the MAP sensor in the air intake, cleaned it with a non residue contact spray. Refitted but no better. Bought a new sensor since they are cheap and quick to fit. No better. My mind started to think there might be a blown gasket between 2 adjacent cylinders, so sent off for a pressure tester kit which arrived today. I was relieved to find all cylinder pressures between 244-250 PSI so I guess the head gasket is fine. There is no sign of any oil in the coolant. What next? Could the injectors (around 82000 miles use) give a lumpy tickover but fine as revs mount?? I see it costs around £50 + postage to send them away for cleaning and testing but not much more for the cheaper new injectors.
Or do I give up and phone a good auto elecrician. There can't be much more to check! At least I have a few more useful tools for my other cars!