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EPR issue

Hello,
I have a problem with the Toyota 7FGCU35 forklift engine, from 2007.
It is GM4.3 engine with IMPCO Spectrum III.
The problem is that the engine runs unevenly, it can also go out.
We've probably found what causes the problem, but we don't know how to solve it, namely:
- when disconnecting the plug from the EPR cables, the engine works properly,
- after connecting the plug with cables the motor is waving and do not have power
We changed:
- repair kit for EPR
- HEGO, Pre-Catalyst
- TMAP Sensor

You can see it on video:
https://we.tl/t-0k3XYCMwCk

thank you for help
  • Posted 14 Apr 2020 04:08
  • By Piter_Wez
  • joined 14 Apr'20 - 1 message
  • Poland
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Showing items 1 - 1 of 1 results.
Have you cleaned the gas throttle? If it doesn't close completely it has the same symptoms.

Good luck with the fix.
  • Posted 14 Apr 2020 06:22
  • By LionKing
  • joined 15 Mar'15 - 24 messages
  • Groningen, Netherlands
d.gruis@home.nl
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Fact of the week
According to studies published in the English Journal of Medicine, the impact of daylight savings is revealed by a 24% increase in heart attacks on the Monday following the spring shift forward. When clocks move back in autumn, heart attacks drop by about 21%, suggesting that loss of sleep is an important driver.