Following my recent problem with the Lexus V8 in Cobra number 1 ( rectification not yet attempted as Car is 1.5 hours away), I now have a serious problem with the Lexus Engine in Cobra number 2.
The car starts great and idles just a little roughly.
However when you try to increase the revs it just dies.
Revs with easy start down its throat like a good but will not respond to the throttle at all apart from dying.
I have checked the complete fuel system any number of times and flow and pressure is good using the original Lexus fuel pump set at 12 volts. I tried a second spare Lexus fuel pump just in case and no improvement.
Originally it had a crank sensor problem which stopped it starting, , which I have fixed, and the only fault code to come up is code 31 which is MAF sensor related, maf sensor wiring or ecu related .
I have tried the car with a number of different MAF's , one I know is good and I have even invested in a brand new one from AIP electronics in the USA.
Every single one makes buggar all difference even the new one, and code 31 still flashes.
I have replaced all the wiring from the ECU to the Maf and it still hasn't made a jot of difference.
I have played with the tps settings and it made buggar all difference.
The ECu and loom came from a Lexus I have been driving for the last 8 years which was a great runner, without any problems whatsoever and which I stripped myself on my drive at home.
The ECU was perfect coming out of the donor vehicle and between being removed from the donor car and being installed in the Cobra the ECU and loom just sat in a cupboard in the garage so there should be little reason to doubt the ECU's health.
Anyone got any ideas.
I have been postponing the UK's Kit car test, the IVA, for this Cobra for the last month to try and get this engine running properly but have so far failed to do so and am now getting heartily fed up with the thing.
Anyone got any ideas as to what could be the problem or any avenues of investigation to try.
Cheers,
Tony
The car starts great and idles just a little roughly.
However when you try to increase the revs it just dies.
Revs with easy start down its throat like a good but will not respond to the throttle at all apart from dying.
I have checked the complete fuel system any number of times and flow and pressure is good using the original Lexus fuel pump set at 12 volts. I tried a second spare Lexus fuel pump just in case and no improvement.
Originally it had a crank sensor problem which stopped it starting, , which I have fixed, and the only fault code to come up is code 31 which is MAF sensor related, maf sensor wiring or ecu related .
I have tried the car with a number of different MAF's , one I know is good and I have even invested in a brand new one from AIP electronics in the USA.
Every single one makes buggar all difference even the new one, and code 31 still flashes.
I have replaced all the wiring from the ECU to the Maf and it still hasn't made a jot of difference.
I have played with the tps settings and it made buggar all difference.
The ECu and loom came from a Lexus I have been driving for the last 8 years which was a great runner, without any problems whatsoever and which I stripped myself on my drive at home.
The ECU was perfect coming out of the donor vehicle and between being removed from the donor car and being installed in the Cobra the ECU and loom just sat in a cupboard in the garage so there should be little reason to doubt the ECU's health.
Anyone got any ideas.
I have been postponing the UK's Kit car test, the IVA, for this Cobra for the last month to try and get this engine running properly but have so far failed to do so and am now getting heartily fed up with the thing.
Anyone got any ideas as to what could be the problem or any avenues of investigation to try.
Cheers,
Tony