Nissan GA15DE Problem

[Mansoor1988]

Hello everyone, I swapped a GA15DE in my 1987 Nissan B12 Chassis. It has been over a year now, the engine was running fine without problems until now.

Following are the problems that i am facing:

1: I feel that the engine has lost it's power, what could be the main reason behind that? Could it be a clutch plate issue or an electrical problem ?

2: The gear ratios are short. Is this normal ? I Usually change to the 5th gear somewhere around 80-90 K mph

3: One of the axel has been welded because i could not find an exact fit. What can be done to get rid of the weld? any possible solution?

I would like to ask all experts to give their opinions and help me out. Thanks.

[Mansoor1988]

22 Views and none replied. Where is everybody ??

[AmeerUsman]

Your respective answers:
1. First of all if you are running your vehicle on CNG then do check for spark plugs and ignition coil etc. If they are ok then go for any mechanical check (e.g, tappet adjustment, clutch plate, pressure plate etc.).
2. If you change your 5th gear at 80-90, then its a good practice...u get fuel economy in early shifts.
3. Purchase a kabli axle and fit it in because welded one adds risk to ur ride.

I hope this helps u find ur problems and their solutions. If not then wait for more opinions.

[wasilrkhan]

2: The gear ratios are short. Is this normal ? I Usually change to the 5th gear somewhere around 80-90 K mph

at what RPM do you change to fifth at these speeds

[NaXuN]

Your respective answers:
1. First of all if you are running your vehicle on CNG then do check for spark plugs and ignition coil etc. If they are ok then go for any mechanical check (e.g, tappet adjustment, clutch plate, pressure plate etc.).
2. If you change your 5th gear at 80-90, then its a good practice...u get fuel economy in early shifts.
3. Purchase a kabli axle and fit it in because welded one adds risk to ur ride.

I hope this helps u find ur problems and their solutions. If not then wait for more opinions.

no tappet adjustment in twin cam engines..!

[AmeerUsman]

Sorry bhai. Pardon my ignorance.

[SER_GTR]

Mention Fuel Type?

How You Get Its Wiring Done..Its Efi Engine ..So There Are Sensors Involved...!

Did You Feel Power Drop Or Clutch Slip While Driving On Incline Areas.....!

Gearbox Is GA15DE's Own Or From Your OLD Engine???

[Mansoor1988]

Your respective answers:
1. First of all if you are running your vehicle on CNG then do check for spark plugs and ignition coil etc. If they are ok then go for any mechanical check (e.g, tappet adjustment, clutch plate, pressure plate etc.).
2. If you change your 5th gear at 80-90, then its a good practice...u get fuel economy in early shifts.
3. Purchase a kabli axle and fit it in because welded one adds risk to ur ride.

I hope this helps u find ur problems and their solutions. If not then wait for more opinions.

Thanks sir, the tappets are not adjustable and the clutch and pressure plate seems to be working fine. I cant find the exact fit of the Kabli axel because the engine has been replaced.

[Mansoor1988]

at what RPM do you change to fifth at these speeds

Dont have an rpm meter installed. So not sure about it :p

[Mansoor1988]

Mention Fuel Type?

How You Get Its Wiring Done..Its Efi Engine ..So There Are Sensors Involved...!

Did You Feel Power Drop Or Clutch Slip While Driving On Incline Areas.....!

Gearbox Is GA15DE's Own Or From Your OLD Engine???

The car has cng installed and the problem persists on both fuels. The wiring was done from Bilal Ganj Lahore last year and has been working flawlessly until now. I bought the engine with it's original gearbox and the clutch plate never slips. I think some sensor is messed up, but which one?

[star2]

get throttle body serviced, and post a picture of the engine bay if possible......

[SER_GTR]

Check MAF Sensor And Clean..

CHeck TPS Sensor

Clean And Service TB

[SER_GTR]

Better Check By Retrieve CODES....You Have CEL(Check Engine Light) Connected?

[Mansoor1988]

get throttle body serviced, and post a picture of the engine bay if possible......

I will definitely get the throttle body serviced and let you know. I was going through your thread about your swap in your B13. Wanted to ask you about the axle rods. Were they a perfect fit ? will post pictures soon..

[Mansoor1988]

Better Check By Retrieve CODES....You Have CEL(Check Engine Light) Connected?

Yes the CEL is connected and i will check and clean the sensors you mentioned in your previous post. Thanks

[Proverbial_Slang]

Was the loss in power sudden or you started feeling it over a period of time? What mileage have you clocked on the engine?

The axles should be readily available in Bilal Gunj and even Montgomery road. This engine is not too rare.

[Mansoor1988]

Was the loss in power sudden or you started feeling it over a period of time? What mileage have you clocked on the engine?

The axles should be readily available in Bilal Gunj and even Montgomery road. This engine is not too rare.

Yes kind of sudden. Dont actually know about the mileage. Been a year now and my daily travelling on an average is around 40-50 Km so you can do the math .. I will get the throttle body serviced and all the sensors checked and clean and then report.