pupster

Nice one Normski , Think I will make a start there and work round to the other things. Gonna buy some contact cleaner and clean all the connectors one at a time to the injectots and anything else i can see. Might even give the MAF a squirt I know they are reliable but never overlook the obvious... I know that this is a simple fault to rectify but it's just getting to the right place. Nothing like the good old fashioned methodology of the old cars lol.... Plus point rotor arm distributor cap days......

Thanks I'll start there and work my way around.... Much appreciated.

Sorry Normski, Had a look at the lexus repair CD but cannot find any reference to the oxygen sensor where are they located ?

Thanks Normski, I'm going to have a poke around at the weekend to try and find anything "Silly" When I looked a couple of weeks ago all of the injectors seemed pretty clean to me (no soot) but I will have another look. If I cant see anything obvious as you suggest then I will have the 3 remaining injectors checked and cleaned and have already contacted Carwood to see if they can do me a day service. I really love the car but this is driving me mad but I do have a local garage with good mechanics and diagnostic tools that I might take it to at least that way I am not ramping up a huge bill. On my last Lexus vist they were going to do a DPF re-generation but the last mechanic said it did not need it I guess they are as baffled.. The interesting thing was that with a little fault like this they were trying to sell me a new car (very suspicious)....

Good morning everyone, I am having no end of troublr with my 2007 IS220D. I posted a topic about rough running in the 2000 RPM rev range and since then things got somewhat worse. Apart from this rough running the car developed a severe missfire and was eventually traced to a fault injector. Prior to all of this I replaced and checked the following. 1. Air Filter (very dirty) 2. Checked the EGR valve (very clean) but gave it another clean whilst it was out 3. Replaced the fuel filter (very dirty) 4. Added fuel additive as reccomended in other forums and a Turbo cleaner additive. I took the car into a lexus dealer who ran all of the diags and they all passed but they slammed the car for other minor things which I can quite easily do myself. Now the injector has been replaced i am back to square 1 again with this rough running especially when I am doing about 80MPH it still feels like a missfire and not what I expect from a Lexus. I am slowly running out of ideas and certainly do not want to spend any more money than I need and would welcome any good suggestions. As an ex mechanic I am feeling as though it is another injector not working correctly but I cannot prove it and wondering whether I should buy a new one and try it systematically in the remaining 3 cylinders.. As a side line since the injector was replaced on Cyl 1 my MPG has improved slightly but nowhere near what it should be. Any suggestions

It does seem that all of the info I have read on this subject that this is pretty common but it's not really a lack of power it's more like a roughness rather reminisant of fuel starvation between 1500 & 2000 revs. Been reading a lot on the subject and was wondering if I diconnected the MAF to see whether I still get the problem or at least eliminate this from the cause. I am thinking of using some BG244 diesel treatment additive to see if this improves things but will need to change the fuel filter first.

Hello, This is my first venture onto this Forum and I have a problem that I would like some guidance on. I have a IS 220D 2007 that has a flat spot/missfire in the 1500 to 2000 RPM Range in all gears. Looking at some of the forum entries the usual suspects came up such as the EGR Valve and air filter as probably being the most likely cause. I have had the car for a week now and looked at the EGR valve which was as clean as a whistle along with the connecting pipe but decided to give it a good clean anyway. I then looked at the air filter and that was in need of changing which I have done but still have the same issue. Now looking at changing the fuel filter as it does feel like a fuel related issue but just wondering what else I can check before I have to go and have it diagnosed. I cannot see anything obvious and the engine does idle as it should and there are no leaks that I can see. On the motorway in 5th and 6th gear I can feel the engine not pulling as it should but when I boot the car in a low gear it does accelerate as I would expect. I would be most grateful for any pointers.. Pupster