|
|
New user
Posts: 16
Location: Glasgow/Argyll | Hi folks, wee problem with my Metro gti. Coolant temperature sensor seems to constantly read 59 degrees when plugged in to a computer and the car is a nightmare to start from stone cold. Swapped to a known working CTS still the same.
Checked the wires back to ECU no breakages and also checked against data to see what voltage I was supposed to see at the plug which seems about right.
Anyone had this problem before and if so, how did you fix it?
Cheers. |
|
| |
|
Transport Guru
MP Moderator
Posts: 4947
   
Location: Bromley, Kent | Where abouts are you?
I have a diagnostics machine that will plug into it if you come to me, or to PoL I'll have it with me. |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | My mate has a diagnostic machine its telling me 59 degrees whether the sensor is connected or not. |
|
| |
|
Transport Guru
MP Moderator
Posts: 4947
Location: Bromley, Kent | Does it throw up any other fault codes?
Try a new CTS mate, genuine Rover if possible. |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | No not that I'm aware! Yeah gonna see if I can get one today! |
|
| |
|
Transport Guru
MP Moderator
Posts: 4947
Location: Bromley, Kent | Remember that 1 is purely for the gauge and other is for ECU. Check on here as to which you need. Can't remember if blue or black. |
|
| |
|
Elite Veteran
Posts: 925
Location: Thinking of vvc'ing my Roadster Brabus :-) | 111Sli - 7/4/2016 9:04 AM
Remember that 1 is purely for the gauge and other is for ECU. Check on here as to which you need. Can't remember if blue or black.
Yes, I was going to say, make sure that the right plug is on the right sensor, gauge sensor has one pin, ecu sensor has 2 pins. |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | Yeah plugs are on the correct place.
Is there a fuel temperature sensor on these? If so where is it supposed to be? |
|
| |
|
Elite Veteran
Posts: 925
Location: Thinking of vvc'ing my Roadster Brabus :-) | paul-h - 9/4/2016 9:07 PM
Yeah plugs are on the correct place.
Is there a fuel temperature sensor on these? If so where is it supposed to be?
These are only normally used on the 'T' series engine and are fitted on the fuel rail.
Does the temp change from 59 deg when you unplug the sensor?,
What does the air temp say? |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | Coolant temp says 59 regardless of plug on or off. We plugged in the air sensor plug to the coolant sensor and it's showing the correct figures. Air temperature seems good too. |
|
| |
|
Elite Veteran
Posts: 925
Location: Thinking of vvc'ing my Roadster Brabus :-) | paul-h - 10/4/2016 6:01 PM
Coolant temp says 59 regardless of plug on or off. We plugged in the air sensor plug to the coolant sensor and it's showing the correct figures. Air temperature seems good too.
Sounds like you either have a duff sensor or the wrong one/type. What does it show with the plug off? |
|
| |
|
Regular
Posts: 113
Location: wigan | Check for any air leaks.  |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | Does no one read previous posts here!! ??
Gonna smoke test the car at some point.
Car goes well when it's warm and doesn't seem to have any issues just the cold start that's a bastard! |
|
| |
|
Elite Veteran
Posts: 925
Location: Thinking of vvc'ing my Roadster Brabus :-) | Is it running too rich when it eventually does start?, |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | It did smell quite a bit of fuel but seems a lot better now it's been used properly ha! But haven't seen properly if it's running rich or not.
It's like it's fueling for 59 degrees constantly as that's what the CTS is telling the ECU. 59 degrees is the reading with the plug connected or not.
Could anyone with a scanner and a 1400 16v engine tell me what reading they get when they pull off the CTS plug? |
|
| |
|
Transport Guru
MP Moderator
Posts: 4947
Location: Bromley, Kent | On my SPi the CTS I have monitored it all the way up to the fan kicking in at 96 or something close. Should run about 89 iirc |
|
| |
|
Elite Veteran
Posts: 925
Location: Thinking of vvc'ing my Roadster Brabus :-) | What are the wire colour codes to your cts, I'll have a look at my early wiring diagrams
I have from Rover. Also what year is your GTi, ie SPi.MPI, alloy inlet manifold or plastic. |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | Wire colours have been checked back to ECU and are correct apart from someone previously has lengthened them but I tried them onto the plug from original wiring with the same results.
MPI with alloy inlet.
Thanks for the fan info but what I'm asking is, what does the live data read when you disconnect the CTS plug from the sensor it's self? As mine is reading 59 constantly I want to know if that's what these cars default to when the wiring is unplugged.
Thanks for replies! |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | Also another thing, this car may have had a chipped ECU at some point l.
Is it called icon or something?
Car is now on standard ECU but not sure what had to be hacked/changed for the chipped ECU to be fitted? It's possible whatever had to be changed hasn't been put back to standard to run the standard ECU properly? |
|
| |
|
Elite Veteran
Posts: 925
Location: Thinking of vvc'ing my Roadster Brabus :-) | paul-h - 23/4/2016 3:03 PM
Also another thing, this car may have had a chipped ECU at some point l.
Is it called icon or something?
Car is now on standard ECU but not sure what had to be hacked/changed for the chipped ECU to be fitted? It's possible whatever had to be changed hasn't been put back to standard to run the standard ECU properly?[/QUOTE/]
Iirc the icon ecu tricks the std ecu into thinking that the temps are different, so the fuelling is upped and ign changed, its a piggyback ecu that plugs between the ecu and the engine, get a std ecu and alarm (if req), and try that, also if, as you say, the temp doesn't change if the sensor is
connected or not, and the wiring os ok, then the ecu is at fault, thats another reason to try another ecu.
|
|
| |
|
Elite Veteran
Posts: 925
Location: Thinking of vvc'ing my Roadster Brabus :-) | paul-h - 23/4/2016 3:03 PM
Also another thing, this car may have had a chipped ECU at some point l.
Is it called icon or something?
Car is now on standard ECU but not sure what had to be hacked/changed for the chipped ECU to be fitted? It's possible whatever had to be changed hasn't been put back to standard to run the standard ECU properly?[/QUOTE/]
Iirc the icon ecu tricks the std ecu into thinking that the temps are different, so the fuelling is upped and ign changed, its a piggyback ecu that plugs between the ecu and the engine, get a std ecu and alarm (if req), and try that, also if, as you say, the temp doesn't change if the sensor is
connected or not, and the wiring os ok, then the ecu is at fault, thats another reason to try another ecu.
|
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | Tried the ECU that's in the car (standard) and two other standard ECU's and all have the same problem. One ECU was a known working unit too... |
|
| |
|
Regular
Posts: 113
Location: wigan | The crankshaft sensor might be worth a look. |
|
| |
|
New user
Posts: 16
Location: Glasgow/Argyll | I'll give that a look but not sure it'll change the CTS reading |
|
| |
|
Transport Guru
MP Moderator
Posts: 4947
Location: Bromley, Kent | Did you ever get a brand new sensor put in? |
|
| |
Cold start and CTS issues.
