I agree with Epik with the fuel management. I purchased the LMS kit a couple of months ago but have been reluctant to install it mainly because of the fuel management issue. IMHO I don't think the iManage is a sufficient solution to fuel management simply because it relies on one single input to determine fuel delivery. A small vacuum hose is used to tell the iManage unit to deliver fuel based on boost pressures at the manifold. As JPI has stated you need to be able to tune your long fuel trim. iManage does not allow for this. A compressor is a compressor. How the fuel is managed is key to the longevity of your motor. There are several options available, but I would suggest talking to a reputable tuner(s) before making the decision. I think once you install a proper fuel management system you will be happy with FI.

 

not familiar with iManage.. can you post a link?

 

LMS makes the i-manage. They just have one page info on the unit. Its on their website.

 

Hmm.. i checked that out. Doesnt say much. Sounds to me like it increases fuel pump voltage under boost, in effect spinning it faster and upping the line pressure. Then again, it is also monitoring injector duty cycle as well, so it is more than likely tied to the injectors. I would look at this as the source of your troubles. A faulty unit would dump fuel at the wrong times.

This iManage unit actually sounds just like my method of making an SAFC2 switch maps based on manifold pressure, instead of Throttle position, except it is contained in one unit.. with blinky lights.

Any word on checking out the oil for gas fumes from over fueling?

 

Ok, thanks to all for all the comments so far, supportive or not. I agree with most of you of course, how can it be my fault that I pay several thousand dollars for a product, and it ruined 2 motors? If i beat the car down or raced the **** out of it, then that's one thing, but in the past 14 months i've put less than 10K miles on 2 motors, TOTAL. the car is a complete show car, so its very heavy with all the stereo equip., etc. I dont drive it fast on cit streets, and i certainly dont race anyone. im not very mechanical at all when it comes to fuel settngs, etc. I bought the product because the way they advertise it made me think that I dont need to worry about that stuff. They sold a kit that would take care of it all for me, with "factory reliability" so to speak. Bottom line, i haven't messed with any settings, so it cant be MY fault. On that same note, I did ask them several times to tune the car on the dyno, and they never did because it was "too hot in the shop". So, it can only lead me to believe that if it was not tuned right to begin with, then of course i'd have the same exact problem with the 2nd motor, since the settings were all the same.

Now, as for an update, i have given them an oportunity to fix the problem and rectify the situation, and they didn't have a problem doing that, at MY cost, buying another new motor. They want nothing to do with accepting any part of it, even the tuning. So, i took the car out of that shop, had a Toyota specialst diagnose the problem, and he documented that he thought the ring was blown, along wth 3 of the coils, and mabe an injector or 2. I then brought it to another independent shop that specializes in FI, toyota drag race cars, etc. They will actually take the motor apart and pinpoint the actual cause of the damage. Why did i do it that way? I needed 2 opinions from shops that I did not know personally, so that if and when this goes to court, I have neutral diagnosis so that it doesnt look like i'm lying. As of now, they are starting on the work and i'll be sure to update you as i get more info.

I know this is REALLY long now, but as a closing comment, I wanted to say that I fully understand that what is said here affects shops all the time. agree wth some previous comments, if there were no problems, we would not post negative, if there are problems and the shop wipes thier hands of it regardless of what the problem could be, then we will tell it like it happened. I haven't made any of this up, and it's all documented. So if anyone is worried about the image of a shop, it's really up to the shop to produce products and services that keep that image clean. It's not like I go around picking shops to bash just because i'm bored. It's not fun for me to drive 5 hours each way every time i have to deal with this issue, so why should I protect the shops image so they can contnue to do this to others? Not gonna happen. I'm glad there are good products from this shop, but mine isn't one of them and it is not my fault.

Peace.

 

and by the way, i haven't had the car in my posession for about a month and a half, so i can't perform any of the tests that you guys suggested, like the dipstick, etc. Sorry! All i can tell you is that the Lexus dealer said the plugs were black, the toyota specialist did both a wet and dry compression check, and the results were abnormal in cylinder number 1 and the coils are bad on at least 3 of the clinders. Now that it's at the 3rd shop, they will completely tell me what is damaged/not functioning. Sorry I haven't got the fuel trim either, same reason, i haven't had the car at all. I'll be sure to let you know what i hear.

 

thanks for the update, i think you are going right route to get things right, find out exactly what happened, and get the right resolution. good luck with it and keep us posted!

 

Wrong. The imanage does not monitor anything other than boost pressure. It is not tied to the injectors. What it does is increase the duty cycle of the injectors by pumping more fuel based on boost pressures of the manifold. It does this by increasing the voltage to a secondary fuel pump based on that boost pressure at the manifold.

 

Don't forget it does have a check valve in place, so nothing will go back to the tank once the secondary intake fuel pump kicks in. This system will work great but in hot weather day you will have problem starting. Fuel in the tank would heat up so quick and it would cause vapor lock. How would you like to start the car up at 130 psi? We are doing some testing on this deadhead fuel and should be able to fix all the bugs. We don't have much experince with I-manage, but XFC from transmission controller works great for us.
JPI

 

good info TXGS, JPI thanks for the clarification. I hadnt thought about an additional fuel pump as a possibility.

 

Interesting..JPI.
I had looked into the XFC but i didn't find alot of info on it. If you have any additional info you would like to share, please PM it to me.
(dont want to jack the thread)

thanks...

 

We will do a write up in the coming week. We had cold start issues worked out. Going to the dyno this weeekend. Should be intereting.
JPI

 

JPI,
Is'nt the XFC a deadhead fuel system also? On their site it looks like it uses an extra fuel pump for fuel management..

 

all in all I hope everything gets worked out , at least the discussion was kept civil

 

Updates...?