Just got a non turbo 'Fairlady' jap import. Runs sweet but when I pull away from a standing start, the car hesitates before going. This also applies in reverse. Any help on the cause and how to stop it would be much appreciated.

This is usually just because the car needs a few little bits cleaning. The cars get on and some parts people just dont think of changing or cleaning.

 

Lets start simple

 

Clean the throttle bodies. Link how to do it is here

 

Take out and clean the water temperature sensor. Its located at the front of the car behind the fan. There are 2 connections, take out the left one, disconnect it and clean the connections and if you can take the sensor out and clean that too.

 

Change the airfilters. My not be due to do it but its worth a try.

 

Clean the Throttle Position Sensor. Cant find the tech to do it but I will look.

 

Change the fuel filter. It may not be due but it wont hurt doing it.

 

Reset the ECU by disconnecting the battery for an hour or so.

 

If you can do 2 or 3 of the things first before you reset the ECU, doing 1 of them may not do too much but do a few and it may help.

 

I am not saying that this will deffinatly sort your problem out, but most people who have that problem, these simple things either get rid of the problem or help it.

 

Stuart

Thanks man, I will replace the fuel filter and re-set the ECU for starters and go from there. Will let you know the outcome.

Hi, as SRRAE (Stuart) says, If you reset the ECU it has to learn the settings again. This takes about 200 miles. In that time is may hunt, bounce or hesitate even more.

 

I would not bother resetting the ECU until you have done at least two or three of these jobs.

The fuel filter changing would not really require an ECU reset as much as the connector cleans.

Hmmmm if you change the breathing/fueling on the car it is ALWAYS advisable to reset the ecu. The only thing it actually re-learns are the correction figures it learns from the O2 sensors while cruising so in theory it shouldn't really hunt or hesitate while doin this....

 

TBH I wouldn't really bother removing the temp sender to clean it. Sounds to me like your best bet would be to change the air filters and fuel filter, clean the throttle bodies, and check the Throttle Position Sensor (TPS) adjustment. You should find all the info you need here:

 

http://www.twinturbo.net/ttnettech/tech.aspx

 

Admittedly most of that info is for the TT but is still aplicable to your car ;)

 

HTH

 

CheerZ,

 

Andy