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Discussion Starter #1
Hi everyone,

I have recently swapped a fresh rebuilt block with 20k km head b18c1 into my eg.
New Injectors, spark plugs, dizzy, cables, etc. fuel filter and pump is old, but was working well with D15.
After awhile I found out that while holding the throttle, the rpm needle jumps about +/- 300-500.
During cruising on hwy (about 4200rpm 5th gear), I can feel a bit of on-off throttle sometimes. It happened sometimes when I hold on at certain rpm during downhill as well.
Also, I can feel the throttle is a bit on-off when below 1500rpm.
The engine idles normally.

Now when we were tuning the car, we found that at WOT.. it sometimes vary between 8.5-9.x throttle.

Could it be tps? or faulty dizzy?

Thanks in advance!
 

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Discussion Starter #3
What ECU are you running? Unmodified P72?

Any issues with acceleration? Deceleration?

Does it feel "jerky" during the scenarios you've mentioned (the "on-off" feeling)?
S300, I doesn't feel like there is any issue with accel nor decel.. jerky on low rpm like somewhere below 1500rpm. it's on-off-on-off..repeat during the holding throttle scenarios above.
 
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