Author |
Topic: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM (Read 736 times) |
|
grandadman
Full Member
This is what I need ;)
Posts: 189
|
 |
Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« on: Oct 17th, 2007, 5:43pm » |
 Quote  Modify
|
I completed my work on the water pump replacement this morning and fired up the engine she purred like a little sewing machine but with the snarl of a tiger when I revved up, so I thought that's good, all sorted - time for a short road test. I went along a ring road and put my foot down and all was well, went around a round a bout and on the way back I lost all drive, it was as if I had pushed the clutch in [which I haven't got] and I could rev the engine up and there was no drive at all then suddenly a heavy clunk and she was back in drive so I slowed right down the car engaged in another gear
and I motored home loosing traction revving out of gear and doing all sorts of daft erratic antics. My first reaction was to lift the bonnet and check the autobox level and quality - all good. level, and nice reddish colour as I know it should be. So right now the car is on my drive until I can find out what is the likelihood cause of this very bad driving behaviour - Can anyone help 
to me it sounds like an electronic control issue. As you know I am new to this world of Scorpios so my learning curve is virtually vertical at the moment - I do not know what I would have done without this club/forum
|
|
 IP Logged |
|
|
|
Danny
Full Member
Posts: 242
|
|
Re: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« Reply #1 on: Oct 17th, 2007, 5:46pm » |
Quote Modify
|
Have you checked the MAF sensor? It may need cleaning
|
|
IP Logged |
ex 1996 24v Cosworth
Now - Mondeo ST TDCI (Sat Nav Built-in/Bluetooth/Voice Control/Xenons/DeCat/Bluefin Remap @ 190bhp)
|
|
|
grandadman
Full Member
This is what I need ;)
Posts: 189
|
|
Re: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« Reply #2 on: Oct 17th, 2007, 5:48pm » |
Quote Modify
|
Where is it located??
|
|
IP Logged |
|
|
|
Simmo
Administrator
I'm an OAP !
Posts: 5508
|
|
Re: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« Reply #3 on: Oct 17th, 2007, 5:58pm » |
Quote Modify
|
It is detailed HERE. Whatever you do don't try and touch the elements, which are like bulb filaments, inside the 'tube'. Just keep spraying with carb cleaner until they are shiny.  If you have been working on the water pump make sure that all the sensor connectors in the area are back in place in case one has been left off. Also check for any signs of 'dodgy' wiring which may have been disturbed, particularly along the top of the radiator etc.  Also go to THIS page and check out the 'transmission' section. Possibly the VSS?. Mike
|
|
IP Logged |
Now I'm an OAP
|
|
|
grandadman
Full Member
This is what I need ;)
Posts: 189
|
|
Re: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« Reply #4 on: Oct 17th, 2007, 9:18pm » |
Quote Modify
|
Hi Simmo Cheers! Tonight I have the MAF assembly stripped ready to attack it and the fine elements [carefully with the spray jet] with carburretor cleaner which I wil buy in the morning.
Taking your advice I will eliminate one thing at a time.
I will report back tomorrow on mt MAF cleansing results.
|
|
IP Logged |
|
|
|
grandadman
Full Member
This is what I need ;)
Posts: 189
|
|
Re: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« Reply #5 on: Oct 18th, 2007, 8:40pm » |
Quote Modify
|
Hi All, I did as suggested yesterday and disassembled the MAF sensor located the small filament etc, bought some carb cleaner and gave it a good wash and brush up without the brush and when I was finished it was squeaky clean, so I reassembled ithe air intake area making sure everything was battened down as it should be because I am a bit of a perfectionist and took the car out to my ring road for a test drive. Whilst the system/engine was cool the car performed quite normally and as it got warmer it started doing it's daft tricks like -
1. Jumping out of gear and staying out until the vehicle stops.
2. The engine revs up to 3000 RPM no drive I slow down and then thump! it re-engages
3. As I am driving up my road it is still doing weird things that I am not able to control.
NOTE: When I started the car up after I cleaned the MAF Sensor it started hunting and after a minute or two it stopped. This hunting, if that is the right term, disappointed me somewhat as I thought on start up from cold the engine would tick over at about 750/850RPM steadily
After the the road test drive the car sat on my drive as if it had never misbehaved steady idle about 750RPM all gearbox lights working. gears engaging as they should but it was getting dark and I was feeling down hearted that cleaning the electrical MAF sensor hadn't fixed my problem.
Anyone got any further ideas I can try tomorrow
|
|
IP Logged |
|
|
|
Simmo
Administrator
I'm an OAP !
Posts: 5508
|
|
Re: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« Reply #6 on: Oct 19th, 2007, 7:33am » |
Quote Modify
|
Grandad, Are you sure that ALL the sensors are re-connected. If the car was ok before the work it does sound as if something has been disturbed or has got water in it during the repair process. As these problems seem to occur when the car warms up could it be related to a temperature sensor, either air or water?. All these components are in the vicinity of the 'repair'. Have a look at THIS pageand see if that helps. The inlet air temp sensor is fitted under the hose on the 2.0ltr.
|
|
IP Logged |
Now I'm an OAP
|
|
|
Tobbe
Junior Member
4.1 litre 24v BOB
 
Posts: 93
|
|
Re: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« Reply #7 on: Oct 19th, 2007, 9:19pm » |
Quote Modify
|
Have you recently had the battery disconnected?
Did you missed to put all wires back before you tried to start her up?
And did you just put back the wire you missed without disconnecting the battery first?
If you have, just disconnect the battery and then reconnect it with ALL wires this time before you try to start her up and everything should be back in normal..... Been there done that 
|
|
IP Logged |
|
|
|
grandadman
Full Member
This is what I need ;)
Posts: 189
|
|
Re: Cosworth 2.9 v24 R reg ERRATIC DRIVE PROBLEM
« Reply #8 on: Oct 19th, 2007, 10:02pm » |
Quote Modify
|
Thanx Tobbe I will check this tomorrow OK?
|
|
IP Logged |
|
|
|
|
Home
Help
Search
Members
Login
Reply
Send Topic
Print