Technical stuttering

Currently reading:
Technical stuttering

chrisstockton

New member
Joined
Apr 18, 2012
Messages
18
Points
7
Hi Guys,

Just looking for some pointers here - the car is a 94 chinq 900cc.

Since we have had it, it stutters quite a bit, it can be when accelerating, and more recently when on a steady throttle. does it for about 2-3 seconds, then it clears and is fine, then does it again. you can liken it to when you used to drive a car that had a choke with it in when the car was cold. LOL.

So its quite low mileage 47K and Ive changed a good few parts on it.
Oil, oil filter, fuel filter, air filter, plugs, ht leads, ecu temp sensor, injector cleaner.

When we bought it the ECU light was on and I traced it to the MAP sensor. I replaced this with a used item from a sporting (hope its the correct one). and the light is no longer on.

Any ideas as its the only thing letting the car down.

Cheers

Chris
 
It sounds like a fuel delivery issue.. or a sparky fault.

If the beast dies one day and then won't start again until it cools down, then that would be a good hint that it's the TDC (crank) sensor.. but they're difficult to test when they're working intermittently and leaving it until it breaks down altogether may be a tad inconvenient.

Meanwhile.. at least eliminate the fuel pump as the problem. You can check the connector block on the fuel pump (lift up the rear seat and remove the square aluminium hatch) and also verify that fuel emerges at the injector (hose off) when you turn the engine over. Do this with a cold engine and catch the petrol in a small jar.

If that checks out okay, it pushes the blame onto the ignition.

Get hold of a spare new coil (£20) and swap one of yours with it, to see if that solves the problem. At least you'll have a spare one if it doesn't.

Otherwise I would look at the TDC doodah.. Again a new one would eliminate this as a cause, if you can stand to lob bits at it.

TDC faults and maybe coil faults appear in the ECU error log, so you may be able to get these read before buying any parts... though no error doesn't necessarily prove anything.. ;)

Ralf S
 
Last edited:
hi there, thanks for the replys guys, the TPS seems to test OK from what I can see with the multimeter.

It is quite random to be honest...

What does TDC stand for?

Cheers

Chris
 
another name for your crankshaft sensor. Located at the bottom of your toothed crank pulley, black sensor, black wire
 
Back
Top