Bmw e30 chokes/shakes and jump in low rpm
I’m having a problem with my beloved car. An bmw e30 316i. So when I’m in any gear (except reverse - manual transmission) and the car is moving, if I lift the foot from the accelarator and let the rpm drop to idle (arround 1200 rpm) the car starts to shake and jump up and down quite fast. But if I press the clutch pedal, the car stops doing that. If the gear is in neutral the car never does this. I had a peugeot 206 and did the same, but not so violently like this e30.
Ps. Me and my dad worked in the car few days ago. We took the intake manifold to replace a fuel pipe and repair a vacuum leak. Before that the car didn’t shake the way it does now. What I am thinking is that the ecu now has a steady flow of fuel and air to the engine and once it reaches low rpm’s, the ecu cuts the fuel supply to the engine (resulting in a choke of it).
Sorry for this long description of my problem :)
Comments
It probably has something to do with insufficient fuel supply.. Maybe try remaping the ECU unit. Or just take the car to the diagnostic expert and then you will know for sure what is wrong with it.
I have the exact same priblem on my toyota but it is not as serious.
It cant be an engine fault as the clutch prevents the problem meaning that the fault is somewhere between the clutch and rear diff
Make sure that all bolts for drive shafts are secure and also if any bolts connecting the gearbox and engine are not tight
If that does nit wirk then the priblen could be much mire serious and xould be in the gearbox
Hiwever most manuels vibrate alot at low rpm
Just not as much as you describe
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VACCUM LEAK
I HAD ONE WITH A REALLY BAD ONE
I say vacuum leak anything else rpm should be a lot lower than 1200.