Discussion
kelvinwannell said:
Does anyone near Dorking or Horsham have a Rover gauge I pinch for a day, still trying to sort my 95 Chimaera 4.0 with hot start issue. Still starts easy when cold, once warm, nothing. May be the kit could help me in the right direction.
If your 'Hot Start' issue is the engine failing to crank then RoverGauge will not offer any help.How often does this happen? If it is quite common then make up a test cable fitted with a 'piggyback' terminal on the end. Fit this cable, and the existing start cable to the starter solenoid. Next time it fails to crank connect the other end of your test cable to the positive battery terminal. If the engine fails to crank then the starter is failing. If it cranks then the issue is somewhere in the car loom or immobiliser.
Steve
Hi
Thanks for the reply, Unfield is not too bad, I will see if anyone nearer comes back, if not I will get in touch. ty.
Cranking is not the issue, it turns over as normal, just floods or something and will not start, once warmed up. Spark seems ok, I think it may be some sort of computer issue, temp sensor is new and giving the correct readings, so the gauge may help.
Thanks for the reply, Unfield is not too bad, I will see if anyone nearer comes back, if not I will get in touch. ty.
Cranking is not the issue, it turns over as normal, just floods or something and will not start, once warmed up. Spark seems ok, I think it may be some sort of computer issue, temp sensor is new and giving the correct readings, so the gauge may help.
Not the normal 'Hot Start' issue then.
RG may well help. The ECU is using a different sensor for engine temperature. it also uses a fuel temperature sensor so when you get RG plug it into a cold car. When you connect with just ignition on, no start, both temperature readings should be about the same which will give you confidence that the sensor is OK. When running you can watch and see if the higher readings are still where you would expect.
Steve
I also have a lead you could borrow but further away in Waterlooville.
RG may well help. The ECU is using a different sensor for engine temperature. it also uses a fuel temperature sensor so when you get RG plug it into a cold car. When you connect with just ignition on, no start, both temperature readings should be about the same which will give you confidence that the sensor is OK. When running you can watch and see if the higher readings are still where you would expect.
Steve
I also have a lead you could borrow but further away in Waterlooville.
Are you sure there are no sensor plugs mixed up, it's a mistake made by many over the years
See below from https://www.actproducts.co.uk/2011/lucas-14cux-fue...
Another common problem is that two or more connectors have become mixed up. The most likely candidates are the Coolant Temperature sensor, Fuel Temperature sensor, and one or other of the fuel injectors. All of these have the same connectors, and can easily be swapped since they emerge from the loom in the same place. Sometimes they all have the same connector shell colour, although the Coolant Temperature sensor is supposed to have a Brown shell, and the Fuel Temperature sensor shell should be Grey.
Where the connector shells are all the same colour, the only way to verify that they are in the right place is by checking the wiring colours within the connectors themselves. All injectors have a Yellow wire (with a secondary colour trace – usually Blue or White) and a Brown/Orange wire. The Coolant Temperature sensor wires are Red/Black and Green/Blue, and Fuel Temperature sensor wires are Red/Black and Black/White.
The most common fault here is to swap the Coolant Temperature and Water Temperature sensor connectors. Symptoms of this problem are usually that the car starts fine from cold, but progressively gets richer as the car warms up. This is because the fuel temperature should always be a lot cooler than the coolant temperature. Note that this particular fault does not show up on a fault code reader or cause a fault code to be set in the ECU, because both values are still within a reasonable range
Hoping this helps
Obviously the above should read....
The Coolant Temperature sensor and Fuel Temperature sensor
See below from https://www.actproducts.co.uk/2011/lucas-14cux-fue...
Another common problem is that two or more connectors have become mixed up. The most likely candidates are the Coolant Temperature sensor, Fuel Temperature sensor, and one or other of the fuel injectors. All of these have the same connectors, and can easily be swapped since they emerge from the loom in the same place. Sometimes they all have the same connector shell colour, although the Coolant Temperature sensor is supposed to have a Brown shell, and the Fuel Temperature sensor shell should be Grey.
Where the connector shells are all the same colour, the only way to verify that they are in the right place is by checking the wiring colours within the connectors themselves. All injectors have a Yellow wire (with a secondary colour trace – usually Blue or White) and a Brown/Orange wire. The Coolant Temperature sensor wires are Red/Black and Green/Blue, and Fuel Temperature sensor wires are Red/Black and Black/White.
The most common fault here is to swap the Coolant Temperature and Water Temperature sensor connectors. Symptoms of this problem are usually that the car starts fine from cold, but progressively gets richer as the car warms up. This is because the fuel temperature should always be a lot cooler than the coolant temperature. Note that this particular fault does not show up on a fault code reader or cause a fault code to be set in the ECU, because both values are still within a reasonable range
Hoping this helps
Obviously the above should read....
The Coolant Temperature sensor and Fuel Temperature sensor
Edited by Polly Grigora on Sunday 7th August 13:37
Once you get sorted and are able to run RG I would be glad to help you fogure whats its telling you. All you need to do is send me a log data file of 10mins at idle.
Fwiw I just helped fix a guys chim in USA frpm here in UK. He had bad earth, bad ECU connection and faulty MAF. Glad to say he is now running all fine again now.
Fwiw I just helped fix a guys chim in USA frpm here in UK. He had bad earth, bad ECU connection and faulty MAF. Glad to say he is now running all fine again now.
kelvinwannell said:
Please can ssomeone confirm: on my 95 chim, injector connectors are black, fuel temp sensor is white, water temp sensor is brown, is that correct?
Thanks for any help.
All information is in the above linkThanks for any help.
Don't take it for granted that the colour of the sensor plugs match to what they should be and all is good, people dabble, plug mouldings are sometimes changed or mixed up
Pull back the boots off the rear of the sensor plugs and check that the wiring colour codes are correct, once all is proven correct you can carry out further testing
The moulding colours you mention (white= grey, brown = brown) check as correct but mean zilch
Have you ever witnessed someone breaking engine plug mouldings and then guessing what's what when replacing them?
Take nothing for granted
Rover gauge or no Rover gauge? That is the question
Edited by Polly Grigora on Monday 8th August 20:48
Gassing Station | Chimaera | Top of Page | What's New | My Stuff