306 Gti6 Help Its Driving Me Mad

[hman205 1]

First of all I will appoligise its still in a 306 at the mo until its running right and I have found a decent 205 to put it in.

 

The problem on going for 18months now ,

 

I get problems with the Dials keep flashing round to 110MPH and 6200Rpm at which point it misfires or runs on 3 cylinders

I have replaced

 

All 4 coilpacks,

Oil & filter twice,

Plugs twice,

Double relay power to ECU..,

CTS (Cam Trigger sensor)

Map sensor,

Battery twice,

Both battery terminals

checked gearbox earth cleaned and put back on

 

Heres a Quick video of what its doing

http://s9.photobucket.com/albums/a64/hman2...100426-0802.flv

Missfire herd at end of Vid only

[Anthony 1,003]

My feeling is that it's more a power/connection issue than a faulty sensor - certainly I know that Phase 1 Xsara VTS's (which are obviously very similar electrically to a '6) do exactly that with the clocks when you disconnect and reconnect the battery, and hence I can imagine that a bad connection somewhere would likely cause the sort of issue that you're seeing - the fact that the odo resets and the fuel needle drops supports this in my eyes, as clearly they're nothing to do with the engine management.

 

From memory, most of the wiring between the engine bay and interior of the car goes via a large multiplug located around the drivers side scuttle panel IIRC. Could it be that water has got into this and has corroded/shorted some of the pins, causing all manner of issues?

[Paul_13 212 1 Cars]

Mate that would drive me nuts!

 

My 306 dturbo does a similar thing when you reconnect the battery, are any of the fuses loose next to your right leg under the steering wheel. There's a slot to stick a screwdriver/2p, this cover pops off and check that they're all in properly.

 

I pulled out a few to try and fix my rev counter and it resets the clocks like what yours is doing.

 

Otherwise what Ant said about the plugs is my only other guess....

 

Dodgy negative terminal on battery?

[hman205 1]

guess i better take the wiper motor out tonight then and take a look

[Paul_13 212 1 Cars]

Oops, read it too quick.

 

There are another 2 plugs located down near the radiator, battery side of engine. Notorious for corroding.

Edited April 26, 2010 by Paul_13