I brought a used honda crv 2004 2.0 AT AWD . After buying and using it for some days i found that its head gasket was once overheated and was changed in addition to that the car ran on aftermarket CNG kit for 3000km . We removed the CNG kit and now the car is giving half it’s actual performance, please help me to regain its original performance, the car’s original 0-100 time was 10.5 seconds but now the car is giving 21 seconds for 0-100 . The agency told us to change throttle body and intake manifold and doing so helped us to improve the performance by only 20% . Odometer is 140000.
The acceleration and pickup are not good , the car feels like taking up load while picking up , and while overtaking it struggles a lot.
Please help me to regain the complete performance. No engine light is on
Please help me to regain the complete performance
Unless you want to drop in another *good condition* engine in your CR-V, it’s time is up.
Too many chefs have already ruined the soup.
Or if you’re attached to the vehicle, drive it as-is till the wheels fall off.
Time for a new car.
WHy sir ?
Because someone has already squeezed all of the juice from that lemon.
IF the engine is completely fine and still has decent compression, how can we consider that the wont be fine again ?
there might still be a lil hope
my friend bought a Camry with the same not enough performance problem and you're saying the head gasket was replaced. lets say if the cylinder head wasn't installed the right way or damaged, there could be problems such as oil and coolant mixture or leaks but if you don't have any of those that means the cylinder head was either not torqued to the right speck or wasn't tightened down in the right order.
but do a compression test to see if you have good compression, that could give you a lot of useful information
hope this helps and have a good day
I really appreciate your answer brother , i will look up for compression test and will surely reply again after the test that if it has helped or not . Thank you so much for your reply and showing concern
looking forward to it
Sir the compression test gave the excellent results
Every cylinder was giving compression around 175
@Digvijay did you do both a dry and wet compression test?
Only dry compression test was done
@Digvijay when you do a compression test, you really have to do both dry and wet tests. A dry test does not tell the full story!
Okay ill do that and will let you know
When they converted the engine to CNG, they made major changes to your engine, air intake, fueling system, and electronic engine controls - you need to find out exactly what they changed, as you have obviously not changed everything back. I am wondering particularly about the gasoline fuel system as it sat idle for all the time the car was CNG, and all kinds of clogging problems can result from idle fuel systems.
But the main problem is how will i be able to figure that out
Can you get a copy of the installation instructions to the CNG kit that was used? Most kits include directions for installation which would help you identify what they adjusted and changed to make it run on CNG. I imagine talking to someone who does CNG installations would also help (I have found that bringing beverages or doughnuts helps get mechanics to discuss these kinds of things.)