so the 2150's won't idle on pump 93 or race gas?

 

I would wait and see if Jens/FIC can at least work out what's wrong...

 

Not on all of these, I know some of these guys are running cut and drilled carriers so the fuel would be mixing. Also if warm fuel was the issue then wouldn't this happen to a 1/4 tank much much quicker than a full tank of fuel? Wouldn't driving and sloshing the tank make the issue less apparent?

I'm just having a hard time wrapping my head around it being hot fuel because it should effect all injectors the same yet even FIC say's the nearly identical 2150's don't have the same problem. Why?

 

depends on the displacement.

BUT worst case is you run open loop idle... just have a rich idle..

 

Yeah I see your point.

we are just posulating its a hot fuel problem which only affects the FIC1680's

it could just be a hot injector problem.. ie internal parts expanding and jamming?!?!

 

I don't know about the rest of you guys but I've taken fuel rails off after a car has sat idle for over an hour and it's always cool or cold. I've never seen fuel get hot while circulating. Now if people are actually having different results with regular Gasoline vs Ethanol with these injectors than I'd look more at flash points or IPW's for issues.

 

well a super easy test for Eric and hotdog todo would be to wait until the problem starts occuring... then wack some ice straight onto the injectors...

its in teh magnets!

 

What fuel pump(s) are you guys using?

 

walbro 255

 

I'm running a double pumper with 255 in a stock hanger on a hobs switch. And personally I'm not believing any of the injector possibilitys so far. My issue is something cut and dry. One start it's a issue ten minutes later it's gone. Nothing to do with heat. It could sit all night and run dead lean on start up or it may run 10.0 it's like a box of chocolates. I believe it's tune... Or possibly a sensor or something mechanical on my car

 

My car has always had issues when running when its reaaaally hot outside, with two completely different sets of ID injectors. Currently I have ID1600's and it runs great till it gets super hot, and runs for a while... like when the engine bay gets heat soaked(sometimes worse after driving a while and letting it sit(1 hour+/-) for a little while in a hot parking lot). I have an open air intake in the engine bay so I am also drawing in hot engine bay air. Most recently when it was 95+ degrees I had trouble again. I have a modified stock hanger... hacked away(used to be twin) so the pump itself can only stay cool if the tank is mostly full. Currently running a single walbro.

I have a cold air intake coming in, just got an unmolested oem fuel hanger, and a new aeromotive 340lph pump with a blaqops kit. I'm hoping that when I install all these I can see if it makes a difference. Hoping everything will come in before next weekend. Also waiting on a few other things. My car seems to go lean after heating up similar to the gent. at english racing chiming in. But not after a 10 mile stroll... takes longer for me. I'm not 100% certain I'm having the exact same issues as everyone in the thread, seems to be some small differences between some cars described.

I'l be logging my car again when I get all this stuff in. (stuck waiting on another wideband too)

 

My issue is definitely heat-related like hotdog's. Once the car is heated up, AFR's go leaner and leaner under load, and especially at idle, to the point where it wants to die. I'm glad we have some smart people working on this, very eager to see if we can get it figured out. I'm waiting for FP to send back my turbo, and when they do I'll slap my old DW 1000's back in, if someone hasn't done so already, to see if the same thing happens.

I have completely re-done my fuel system with a blaqops billet hanger, -10 feed ss lines and -6 ss return lines, with 2 walbro 255's and if it helps at all, the fuel pump hanger did seem pretty hot to the touch after awhile....

 

I'm eating my words on this..... It IS the heated fuel causing issues. I wouldn't nor couldn't believe it until I went over the engineering reasons why with someone else in the industry. Basically it comes down to the same reasons why you can't run oxygenated fuels in some injectors like these. Long story short there are a specific type of rubber seat in these injectors that are also in the Injector Dynamics 1650's swell when heated / or when they come in contact with fuels containing MTBE.

Again these are the same body injectors that ID uses for the 1650's and when they found out what was going on they recalled them and supplied their customers with 2000cc injectors for free in exchange. The techs at ID couldn't replicate the issues on the flow bench so the utilized their rolling test vehicle (Mazda with a MoTech and various sensors) and sure enough the hot fuel caused a 40-100% reduction in fueling.

So just a heads up those if you with FIC 1650's you won't be able to tune this issue out (More info to come later)

 

So E85 shouldn't be an issue though right Hollywood?

 

Hi all,

Anyone with ID1600's please contact me to exchange them.

July 15, 2011

The Injector Dynamics ID1600 has been discontinued due to excessive fuel temperature
sensitivity which was recently revealed by ongoing product testing.

Additional testing was prompted by customer feedback suggesting that the ID1600 exhibited
reduced flow rates when operated with high fuel temperatures.

Extensive on-vehicle testing was performed while varying fuel temperature, and the results
confirmed two things:

1. The ID1600 did in fact exhibit temperature sensitivity with flow decreasing as fuel temperature
increased.

2. The temperature sensitivity was not linear and became extreme at high temperatures.

These test results explained why the reported problems were limited to those performing
extended chassis dyno tuning, or driving in hot climates with fuel systems prone to fuel heating.

The results also explained why the overwhelming majority reported no problems, and why our
initial on-vehicle and flow bench testing showed that the ID1600 met our standards.

These standards set by Injector Dynamics have driven the industry forward, and we will
continue to set and exceed those standards.

Injector Dynamics is offering a free upgrade to ID2000's for those interested in exchanging their
ID1600's.

If you are experiencing a problem and would like to take advantage of the free upgrade, please
contact Tony@T1racedevelopment.com and have your original invoice and injector serial
numbers handy.