I'm not sure that Wits have an end, but if they do, I'm at the end of mine! Having issues with our underused K11 micra, 1.0 coilpack version.
Here is the story so far for those bored or technically mined enough to read it...
Due to non-start and general running issues.
Symptoms - Occasional starting issues - usually when hot, misfire from suspected overfueling when under load, or heavy acceleration. The car would usually start with the coolant sensor unplugged, but exhibited the same symptoms when driven. (Very occasionally - when driving at speed, it would throw a "system lean - bank 1" code, cleared and would be fine for weeks)
Replaced (for the 2nd time) coolant sensor with a Delphi item. Same result.
Replaced Coil packs and Camshaft position sensor. Same result!
Removed the entire throttle body and cleaned everything, cleaned the MAF sensor hot wire.
Ran car with MAF sensor unplugged, symptoms exactly the same, so MAF assumed OK.
Checked throttle position sensor, lubricated; this seems fine.
Removed the idle control valve, cleaned with carb cleaner and re-assembled. Idling fine, revs increase as expected when high load electrical circuits opened so assume OK.
(replaced throttle body using DIY cardboard gasket, as old one was shot, and not available seperately for Bosch throttle bodies - must locate and fit one!!)
Replaced all 4 spark plugs.
Replaced (with used items) the fuel rail, fuel pressure regulator and fuel injectors. Changed the fuel filter and replaced all fuel lines after the filter with new items, as the old ones had “crusting” on the insides. (suspected issues caused by E5 fuel sitting in lines unused for 3 years)
Long cranking time resulted in a start. Very smooth tickover, easy revving at standstill. No fuel leaks, no rich smell at the exhaust.
Test drive confirms issues still exist. Runs fine at light throttle, but struggles when demand is put on the engine. Deeper pedal results in backfiring, holding back, and poor acceleration. Starting is often after a long crank and “chugging” to stall, then the 2nd try starts immediately and revs freely. Really smooth tickover with no hunting.
Any ideas? I'm fed up of getting excited when I change a part, only for it to be doing the same when I drive it. No fault codes, so no issue as far as the car is concerned.
Any help or advice appreciated. I used to sell K11's when they were new in 1994, and loved them then. I know that this car has so much more to give, but is holding back, it's like it wants to go, but it can't.
Please help it!
Here is the story so far for those bored or technically mined enough to read it...
Due to non-start and general running issues.
Symptoms - Occasional starting issues - usually when hot, misfire from suspected overfueling when under load, or heavy acceleration. The car would usually start with the coolant sensor unplugged, but exhibited the same symptoms when driven. (Very occasionally - when driving at speed, it would throw a "system lean - bank 1" code, cleared and would be fine for weeks)
Replaced (for the 2nd time) coolant sensor with a Delphi item. Same result.
Replaced Coil packs and Camshaft position sensor. Same result!
Removed the entire throttle body and cleaned everything, cleaned the MAF sensor hot wire.
Ran car with MAF sensor unplugged, symptoms exactly the same, so MAF assumed OK.
Checked throttle position sensor, lubricated; this seems fine.
Removed the idle control valve, cleaned with carb cleaner and re-assembled. Idling fine, revs increase as expected when high load electrical circuits opened so assume OK.
(replaced throttle body using DIY cardboard gasket, as old one was shot, and not available seperately for Bosch throttle bodies - must locate and fit one!!)
Replaced all 4 spark plugs.
Replaced (with used items) the fuel rail, fuel pressure regulator and fuel injectors. Changed the fuel filter and replaced all fuel lines after the filter with new items, as the old ones had “crusting” on the insides. (suspected issues caused by E5 fuel sitting in lines unused for 3 years)
Long cranking time resulted in a start. Very smooth tickover, easy revving at standstill. No fuel leaks, no rich smell at the exhaust.
Test drive confirms issues still exist. Runs fine at light throttle, but struggles when demand is put on the engine. Deeper pedal results in backfiring, holding back, and poor acceleration. Starting is often after a long crank and “chugging” to stall, then the 2nd try starts immediately and revs freely. Really smooth tickover with no hunting.
Any ideas? I'm fed up of getting excited when I change a part, only for it to be doing the same when I drive it. No fault codes, so no issue as far as the car is concerned.
Any help or advice appreciated. I used to sell K11's when they were new in 1994, and loved them then. I know that this car has so much more to give, but is holding back, it's like it wants to go, but it can't.
Please help it!