No improvement despite refurbished throttle bodies
Discussion
Hi Guys,
Some of you know that I have had an issue with hesitation on my Cerb at light throttle recently and I have just fitted Power Performance throttle body Gaskets and had my Throttle bodies refurbished at Str8six and fitted by myself.
Today I balanced the throttles up on the laptop all of them at 5 on the synchrometer then reset the throttles on the software along with the addaptives. I excitedly jumped in the car and went for a short spin my first one in 9 weeks and there is no improvement and it seems to pop and bang more and louder even under low revs.
So farI have changed the following
HT Leads( twice)
The Coil pack
Throttle bodies all six
Power Performance gaskets
12 month Service with tappets adjusted.
Here is a pic of the software after I had balanced the throttles let me know if anything looks out of the ordinary.
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The fuel vacuum has taken a bash during transit, do you think it will be having a negative effect on the running of the engine, I will get a new one on order shortly but at the moment I have a expensive garden ornament (Cerbera) and being up in Scotland I dont really have anyone up here that could diagnose this kind of fault so looks like it might be a long treck south which I was hoping to avoid.
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Some of you know that I have had an issue with hesitation on my Cerb at light throttle recently and I have just fitted Power Performance throttle body Gaskets and had my Throttle bodies refurbished at Str8six and fitted by myself.
Today I balanced the throttles up on the laptop all of them at 5 on the synchrometer then reset the throttles on the software along with the addaptives. I excitedly jumped in the car and went for a short spin my first one in 9 weeks and there is no improvement and it seems to pop and bang more and louder even under low revs.
So farI have changed the following
HT Leads( twice)
The Coil pack
Throttle bodies all six
Power Performance gaskets
12 month Service with tappets adjusted.
Here is a pic of the software after I had balanced the throttles let me know if anything looks out of the ordinary.
[/URL][/URL]The fuel vacuum has taken a bash during transit, do you think it will be having a negative effect on the running of the engine, I will get a new one on order shortly but at the moment I have a expensive garden ornament (Cerbera) and being up in Scotland I dont really have anyone up here that could diagnose this kind of fault so looks like it might be a long treck south which I was hoping to avoid.
[/URL]Edited by natben on Wednesday 17th July 18:35
natben said:
Hi Guys,
Some of you know that I have had an issue with hesitation on my Cerb at light throttle recently and I have just fitted Power Performance throttle body Gaskets and had my Throttle bodies refurbished at Str8six and fitted by myself.
Today I balanced the throttles up on the laptop all of them at 5 on the synchrometer then reset the throttles on the software along with the addaptives. I excitedly jumped in the car and went for a short spin my first one in 9 weeks and there is no improvement and it seems to pop and bang more and louder even under low revs.
So farI have changed the following
HT Leads( twice)
The Coil pack
Throttle bodies all six
Power Performance gaskets
12 month Service with tappets adjusted.
Here is a pic of the software after I had balanced the throttles let me know if anything looks out of the ordinary.
[/URL]
[/URL]
The fuel vacuum has taken a bash during transit, do you think it will be having a negative effect on the running of the engine, I will get a new one on order shortly but at the moment I have a expensive garden ornament (Cerbera) and being up in Scotland I dont really have anyone up here that could diagnose this kind of fault so looks like it might be a long treck south which I was hoping to avoid.
[/URL]
Both lambdas are inactiveSome of you know that I have had an issue with hesitation on my Cerb at light throttle recently and I have just fitted Power Performance throttle body Gaskets and had my Throttle bodies refurbished at Str8six and fitted by myself.
Today I balanced the throttles up on the laptop all of them at 5 on the synchrometer then reset the throttles on the software along with the addaptives. I excitedly jumped in the car and went for a short spin my first one in 9 weeks and there is no improvement and it seems to pop and bang more and louder even under low revs.
So farI have changed the following
HT Leads( twice)
The Coil pack
Throttle bodies all six
Power Performance gaskets
12 month Service with tappets adjusted.
Here is a pic of the software after I had balanced the throttles let me know if anything looks out of the ordinary.
[/URL][/URL]The fuel vacuum has taken a bash during transit, do you think it will be having a negative effect on the running of the engine, I will get a new one on order shortly but at the moment I have a expensive garden ornament (Cerbera) and being up in Scotland I dont really have anyone up here that could diagnose this kind of fault so looks like it might be a long treck south which I was hoping to avoid.
[/URL]Edited by natben on Wednesday 17th July 18:35
Dom
Same situation here.
Power gaskets, new ht leads, ignition coil, pots, both lambdas and balancing for the third time with no real effect.
Last thing i will try next is replacing all bodies. I get a set off a Tuscan mk2 from a mate.
Curious: when i disconnect the lambdas the car runs smooth! Adaptives are >=30 then, too.
I think it's due to the rich mixture.
Power gaskets, new ht leads, ignition coil, pots, both lambdas and balancing for the third time with no real effect.
Last thing i will try next is replacing all bodies. I get a set off a Tuscan mk2 from a mate.
Curious: when i disconnect the lambdas the car runs smooth! Adaptives are >=30 then, too.
I think it's due to the rich mixture.
I had a chat with Dom this morning and the feeling is that the fault is perhaps electrical , I changed a few fuses this morning but it made no difference, So, next move is to get it to TVR Power, I can do no more up here, I have barley used the car in the last 14 months and it is starting to wear me down , I have a cracking car that I have spent over £13k on and it is sitting on the drive going nowhere.
Now the next issue, how do I get it to Coventry?
If anyone is passing through Scotland with a trailor going south let me know!
George.
Now the next issue, how do I get it to Coventry?
If anyone is passing through Scotland with a trailor going south let me know!
George.
natben said:
I had a chat with Dom this morning and the feeling is that the fault is perhaps electrical , I changed a few fuses this morning but it made no difference, So, next move is to get it to TVR Power, I can do no more up here, I have barley used the car in the last 14 months and it is starting to wear me down , I have a cracking car that I have spent over £13k on and it is sitting on the drive going nowhere.
Now the next issue, how do I get it to Coventry?
If anyone is passing through Scotland with a trailor going south let me know!
George.
Don't sell it whatever you do! There are very few Cerbs I have seen which I prefer over my own, but yours is one of them and it will put me in a prediciment! Now the next issue, how do I get it to Coventry?
If anyone is passing through Scotland with a trailor going south let me know!
George.
Edited by PuffsBack on Thursday 18th July 18:03
Hi natben,
first i would check if both Lambda connectors are ok, although i can't see why they shouldn't be, when you didn't touched them. The fuse is only for the lambda heaters iirc, so the reading should be fine after some time even when fuse went.
But you should check the main bulkhead connector if all pins are in correct position. The lambda signals both going in there to the ECU. Maybe it isn't connected properly. I don't see any other reason for the lambda fault (except ECU failure?).
first i would check if both Lambda connectors are ok, although i can't see why they shouldn't be, when you didn't touched them. The fuse is only for the lambda heaters iirc, so the reading should be fine after some time even when fuse went.
But you should check the main bulkhead connector if all pins are in correct position. The lambda signals both going in there to the ECU. Maybe it isn't connected properly. I don't see any other reason for the lambda fault (except ECU failure?).
Edited by twinreal on Thursday 18th July 19:34
PuffsBack said:
Don't sell it whatever you do! There are very few Cerbs I have seen which I prefer over my own, but yours is one of them and it will put me in a prediciment!
Haha No Puff I dont intend to sell it any time soon, Infact Im an admirer of your Cerb too. I have lost count of the number of times I have watched it popping and banging down the road on you tube, I have had to as mine has been doing nothing. On the plus side its bloody clean thats all I have been able to do to it all summer!!. Edited by PuffsBack on Thursday 18th July 18:03
twinreal said:
Hi natben,
first i would check if both Lambda connectors are ok, although i can't see why they shouldn't be, when you didn't touched them. The fuse is only for the lambda heaters iirc, so the reading should be fine after some time even when fuse went.
But you should check the main bulkhead connector if all pins are in correct position. The lambda signals both going in there to the ECU. Maybe it isn't connected properly. I don't see any other reason for the lambda fault (except ECU failure?).
Twinreal, thank you for all your advice. I will have a look at the connectors but I do not know where they are on the Cerbera, I think it might be below the battery and the expansion tank. My enthusiasm for taking things apart is very low at this time however and feel that taking it to TVR Power will give me back the car I once had and enjoyed. first i would check if both Lambda connectors are ok, although i can't see why they shouldn't be, when you didn't touched them. The fuse is only for the lambda heaters iirc, so the reading should be fine after some time even when fuse went.
But you should check the main bulkhead connector if all pins are in correct position. The lambda signals both going in there to the ECU. Maybe it isn't connected properly. I don't see any other reason for the lambda fault (except ECU failure?).
Edited by twinreal on Thursday 18th July 19:34
Had the bodies done a month ago at power, what a difference. Now starts and runs so well. It will be worth getting sorted and enjoy. Hope you can find away to get car to cov., I'm lucky living only a few miles away on the south side of cv.its such ashame when problems stop us enjoying our fabulous cars(we have all been there) .keep smiling.
natben said:
Haha No Puff I dont intend to sell it any time soon, Infact Im an admirer of your Cerb too. I have lost count of the number of times I have watched it popping and banging down the road on you tube, I have had to as mine has been doing nothing. On the plus side its bloody clean thats all I have been able to do to it all summer!!.
lol - don't want to depress you further but the mine came back from a 12k service last week, needed nothing, and in this heat its popping and banging like crazy. Just spent the weekend away with the Mrs (at the Salthouse Harbour hotel in Ipswich, highly recommended) and a highlight was driving the Cerb down the packed Quayside with all the Bistros and bars etc with people stopping in their tracks to look at the CerbMy Cerbera is being picked up tomorrow and will be at Power on Tuesday, so hopefully I will have my own popping and banging stories shortly Puff, but knowing my luck the current hot spell will makeway for a prolonged wet spell just as I get a call to say my car is fixed. Its a certainty!!!
Connect laptop, watch lambdas. Should ping-pong up and down from low to high one mixture is under control. If stuck low then underfueling (too much air). Try the "carb cleaner" spray test around the throttle bony to head gaskets...lambda will go instantly high if it sucks carb cleaner under the gasket. Care to direct cleaner exactly at the gap using applicator pipe.
Update,
I collected my car from TVR Power on Wednesday and drove 330 miles home in torrential rain all the way home, Stop start traffic up the M6 in horrible conditions over 7 hours driving and the car was perfect. I have covered now 500 miles since I collected it from Dom. 14 months of frustration are finally over and the car is back to how it should be.
MASSIVE, MASSIVE thanks to Dom for getting me back on the road, honestly guys I can't thank him enough
George
I collected my car from TVR Power on Wednesday and drove 330 miles home in torrential rain all the way home, Stop start traffic up the M6 in horrible conditions over 7 hours driving and the car was perfect. I have covered now 500 miles since I collected it from Dom. 14 months of frustration are finally over and the car is back to how it should be.
MASSIVE, MASSIVE thanks to Dom for getting me back on the road, honestly guys I can't thank him enough
George
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