Morning all,

I have a engine problem I could use some advice for.

 

The engine will not rev above 2500 rpm.

 

At a standstill if I hold the throttle at 2500rpm the engine appears to rev itself between 2000 and 2500 rpm, very rythmically like hitting a rev limiter as it chops at 2.5k.

 

In fwd motion as you hit 2.5k the car judders violently.

 

 

Over the last few months the car has had a similar problem, it was reluctant to accelerate under light throttle, it would stutter etc but would get through it and rev out fine. Sometimes though you could run it without a problem.

 

I have had issues with the two water temp sensors at the front but am pretty certain I have a good connection there at present as the tickover is fine.I did find a broken wire here on the single spade plug and a loose connection on the double spade just before this 2.5k limit problem started. Could it be that the ECU needs to be reset after coping with dodgy wiring problems?

 

Any ideas please?

 

Cheers Rob.

AFM plug loose broken disconnected, very big boost leak ?

Its something to do with the maf sensor at the front of the car just before the intake. take it off have a look maybe theres water init or maybe you need a new one:(

 

try reseting the ecu after youve checked all that.

ok thanks

Are the AFM and MAF sensor one and the same? Mass air flow/ air flow meter?

 

The MAF sensor plug is clean and dry however the screws retaining the connector are quite rusty and the cap is bowed so moisture could/ will have have got in.

 

I removed the Maf sensor plug and ran the engine, there was no difference at all so I am thinking new MAF sensor however it would be nice to know if the MAF sensor is disconnected on a healthy 1994 z32 tt that the same problem occurs. Any volunteers?

yes its the same thing,

if water has got to it then its more than likely had it.

yes find a healthy zed and switch them round see if they develop the same prob.

or use theres and see if all is well :)

then buy a new or used one:)

MAF sensor fubar