I am back with my slightly problematic cultus to seek advice from fellow members/experts,
I am going to put the car credentials before posting the problem (As per capsat's guidelines in another thread)
Car: Cultus 06 Carby
Odo : 67K
Owner Since: Day 1
Maintenance Schedule :
-Oil change at 4K (Shell Helix)
-Air filter Change (4K)
-Spark Plug change (5-6K)
As some of you may know, earlier i faced an ignition related problem that caused missing at 2.7K rpm. But with proper spark plug gap adjustment (0.8mm) and timing advance, the problem was resolved.
This time I had the chance to take it on a long route after quite some time. The car was tuned fine a day ago (carburator cleanup with petrol spray, idle rpm and CNG adjustments etc). The problem I faced was having difficulty taking the car above 100kmph. Even in 4th gear, the car had difficulty going from 80 to 100. I tried increasing the gas a bit and that helped a bit but i knew any further increase would render jerks under load. So now that I am sure that CNG adjustment is fine. (It gave 200KM on a full cylinder that day)
Turned it to petrol. Turns out that its behaving same (ditto) as it was doing before. Though great pick-up from 0-80, but once in 4th gear, it was like 80-100 in 45 secs. And as soon as I would engage the 5th, it would start coming down to 90 again.
The car consumes petrol in an insane way. It only did 34 KMs in 5.6L . Thats like 6.4Km/L and thats sad. Tried getting it adjusted many times but of no use. Its either too much consumption or a jerky ride.
For reference, the compression test results (done today) are as follows. These are purely for a cold engine.
Cylinder 1 : Dry-178 psi , Wet - 205 psi
Cylinder 2 : Dry-178 psi , Wet - 198 psi
Cylinder 3 : Dry-180 psi , Wet - 204 psi.
The last time i did it on a hot engine, the readings were
Cylinder 1 : Dry-171 psi , Wet - 200 psi
Cylinder 2 : Dry-179 psi , Wet - 205 psi
Cylinder 3 : Dry-178 psi , Wet - 198 psi.
Please do share your experiences/troubleshooting step by step guide/suggestions and recommendations.
Link to Diagnosis Part 1
Edit: The problem has been resolved to reasonable extent. Please refer to post #63 on page 4 for further information.
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