Hello folks have a problem that has me stumped.When the car, bravo jtd 105, goes over a bump the ecu light comes on and engine loses power. Does anyone have experience of this or have an idea of how to fix this. Any suggestions much appreciated.

Hello,
With only the info supplied, looking at the problem logically something is coming loose or shaken up. How much power do you loose and does it only reset itself once the car is turned off and restarted.

Thanks for the reply. At times the car especially in town traffic goes from dawdliong along to off like a rocket under lioght acceleration. If you hhit a hard bump the light comes on and needs to be reset by turning off the ign. Even then it sometimes comes on as soon as you press the throttle. The only thing yhat springs to mind is the potentiometer which is attached to the pedal What do you think Cheers

Does the car fail to rev and does it come to a complete powerloss ticking over at around 800rpm this would suggest a throttle position fault if not accompanied by blackish smoke.

If it looses a percentage of power but still drivable then possibly its gone into limp home mode.

If churning out black smoke then an intercooler pipe or turbo vacuum pipe could have become dislodged etc.

Must admit, its a strange one.

Hi mate,

When the engine management light comes on and you lose power, it sounds like your going into SAFE mode. If you have the fault codes read, it should pinpoint what exactly is putting it into safe mode, HOWEVER, its common for the connection on the MAP sensor to be rubbed/knocked by the plastic engine cover.

If you dont know where the MAP sensor is on the JTD then have a look at this GUIDE.

Remove the electrical multi-plug, make sure all 3 of the pins are fully down and are not bent/corroded on both the MAP sensor and the wiring multi plug. Also check the wires for any splts/ breaks.

Plug it back in and go for a drive down a bumpy road. If the problem doesn't occur, id suggest its fixed!! Worth a go before you start paying out for diagnostics etc. Could be many things but the MAP sensor one is common.

Oh and the reason this fault (ie with the MAP sensor connection) occurs when accelerating, is the twisting motion of the engine on the engine mounts is enough to move the wring harness connected to the MAP sensor.

Failing that, fault codes should help!

Hope that helps,
Alan