Rough Running! CURED!!!

[dalecrx]

Hi,

I have had a real problem with my tvr over the last few months. It used to always misfire below 2000rpm and Kangaroo if at 30mph in 4th or fifth gear.

I tried new leads, new spark plugs, checked and tested all sensors refering to the bible.

I was getting no where fast, i spent alot of time reading Steve Heaths Bible and paid partciular attention to the Coolant Temp Sensor, which is a sensor which checks the temperature of the coolant around the engine and sends the info back to the ecu. I checked this sensor using a ohm tester, as described in the bible and it looked as though it was ok, but it is hard to get a true reading comparing it to the temp of the engine. As it states in the bible if there is any problem with the fuelling, this sensor is normally changed straight away, as it normally cures most faults.

I bought this sensor from my local motor factors in farnborough "Whoppe Motor Factors" part no SNB802, this is a Lucas Part. This sensor only cost £13.

After changing this sensor i thought i would take the chimaera out for a spin, thinking that it wouldnt make the slightest bit of difference. Well the change was amazing, no more misfiring, no more kangarooing, nice smooth running and it pulled so much better at low revs.

This sensor did not come up on any test equipment saying it was faulty or out of range when tested at a TVR garage.

I strongly recommend if anyone is having rough running, or idling problems or not being able to drive at 30mph or 40mph in 4th or 5th without kangarooing and shunting the transmission everytime, to change this sensor.

Cause this sensor was not fuctioning correctly it was causing over fuelling and rough running.

I can now enjoy driving my Chimaera every day!!!!

Cheers

Dale

[dalecrx]

It took me at leat 2 minutes..

Use a 19mm spanner, it is located in front of the plenum chamber just under the pipe going to the swirlpot from the engine. it has a white connector or maybe black depending on year of chimaera.

It is well worth changing!!!!

It takes no time at all.

[dalecrx]

Its a Lucas part SNB802,

but youre exactly right!! as i used to beable to smell the petrol after starting up mine, it used to run rich very rich!!!

There is also another one of these sensors in the fuel injection rail, im tempted to replace this one too, but i will take it out and test it first.

[dalecrx]

I have a 94 L reg TVR Chimaera 4.0 HC

Im almost 100% sure this part will cover all the chimaeras?

For the matter of £12 - £13 and its so easy to change too!!

Let me know if it cures any of oyur idling or kangarooing??

Dale

[dalecrx]

I can do Mike, let me know if you need any help at all. I can get the part for you if you want as my friend works at Whoppee Motor Factors.

Dale

[dalecrx]

I didnt have a deep 19mm socket, so i just used a 19mm spanner, which did the job very easily.

My Chimaera does not have PAS, or Air Con, so there is more room to get to the sensor. Now i have smooth !!

Dale

[dalecrx]

Hi,

Can you give me the number of where you bought the lucas SNB802 from?? As i want to put the lucas part in as i found that the intermotor part worked for about 3 weeks, then went back to running rough.

Cheers

Dale

[dalecrx]

Hi,

I cant seem to find a number for that address you gave me?

Any ideas what the phone number might be??

Cheers

Dale