My friend has a 1990 CRX which has a JDM B16A motor in it. He is also using the JDM ECU. Since the day he installed it, he has been getting partial throttle sputtering issues. If the throttle is held at a certain position, the car will "sputter"

We recently changed the fuel pump from the stock Multi Port injection fuel pump to a GSR fuel pump. Car runs much better however the "sputter" is still there under the same circumstances? What can it be?

 

Check the timing it might be off a hair. Mine sputtered when I did the timing belt because it was off a little. does it back fire?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TommyBB &raquo;</TD></TR><TR><TD CLASS="quote">Check the timing it might be off a hair. Mine sputtered when I did the timing belt because it was off a little. does it back fire?</TD></TR></TABLE>

Time to time.

 

check the timing because mine was only off a coupld degrees but it made it sputter and stall every once in a blue moon

 

does he have BOTH o2 sensors installed?

 

make sure there are no vacumn leaks how does it idle?

check timing

adjust tps

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx_88_si &raquo;</TD></TR><TR><TD CLASS="quote">does he have BOTH o2 sensors installed?</TD></TR></TABLE>

As far as I know, just 1.

Idles great actually.

 

i had symptoms like that when my timing was off

 

Check timing/ fuel filter/ fuel pressure regulator etc.....

 

I had the same problem with my car... my timing was only off one tooth!!!! i would chech ignition timing also though and for any vacuum leaks, take a can of starting fluid and spray around the intake manifold and any vacuum hoses you can get to, if the idle goes up then you know you have a vacuum leak. this process is easy, fast, and really works!!!!

 

not to steal this thread but will the timing belt really cause the car to back fire. because mine back fires ever time i let off the gas.

 

Ended up being a distributor.