Larger injectors - warm start issues
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From: Tri-Cities, WA // Portland, OR
I'll definitely start considering the FIC 1100s. They seem pretty expensive to justify for the time being though. I'm sure my mind will change after a few more weeks of this warm starting issue.
Another question. If the issue is indeed leaking injectors after shutting the car down, is the fuel going into the combustion chamber, thereby seeping it's way pass the cylinder seals and into the oil?
Another question. If the issue is indeed leaking injectors after shutting the car down, is the fuel going into the combustion chamber, thereby seeping it's way pass the cylinder seals and into the oil?
Last edited by mrfred; May 15, 2011 at 06:31 AM.
how do you get that cranking enrichment table on a 94170008 rom? my car does the same thing with my rc 1000's and i cant seem to get it to start easy when warm. and ive heard that table will help alot! but i dont no how to get it. or a mut table.? pleaaase help
Hey OP, have you fix it yet or are you still playing with it? I myself have the same exact situation as you and i'm about to say forget this sh.t. I have the FIC1050cc injectors and everyting you pointed out in this thread is what I'm going through right now, same Exact problem. The injectors are brand new, it costs me about 340 dollars, i also have a brand new battery. But I never get to understand why the hell so many of us get this problem. There has to be a Way someone on this forumn can point just one answer to help us all. My car is tuned and according to my tuner he has done everything on the setting but in the end my car still starts like crap. Very frustrating after throwing so much money into mods, tune, installation and when you about to turn on the car, it takes the fun away.
Do you think going to the 880cc injector would help this issue? I would get the 880cc injector if it would cure this but I'm keep asking myself why do i have to spend more money when I just paid for some brand new injectors.
What about the E-85 guys, how come we never hear anything from them??? I know they run 1200++ injectors. Don't they have the same problem as us???
Do you think going to the 880cc injector would help this issue? I would get the 880cc injector if it would cure this but I'm keep asking myself why do i have to spend more money when I just paid for some brand new injectors.
What about the E-85 guys, how come we never hear anything from them??? I know they run 1200++ injectors. Don't they have the same problem as us???
Thread Starter
Joined: Jun 2003
Posts: 2,202
Likes: 20
From: Orlando, FL
Hey OP, have you fix it yet or are you still playing with it? I myself have the same exact situation as you and i'm about to say forget this sh.t. I have the FIC1050cc injectors and everyting you pointed out in this thread is what I'm going through right now, same Exact problem. The injectors are brand new, it costs me about 340 dollars, i also have a brand new battery. But I never get to understand why the hell so many of us get this problem. There has to be a Way someone on this forumn can point just one answer to help us all. My car is tuned and according to my tuner he has done everything on the setting but in the end my car still starts like crap. Very frustrating after throwing so much money into mods, tune, installation and when you about to turn on the car, it takes the fun away.
Do you think going to the 880cc injector would help this issue? I would get the 880cc injector if it would cure this but I'm keep asking myself why do i have to spend more money when I just paid for some brand new injectors.
What about the E-85 guys, how come we never hear anything from them??? I know they run 1200++ injectors. Don't they have the same problem as us???
Do you think going to the 880cc injector would help this issue? I would get the 880cc injector if it would cure this but I'm keep asking myself why do i have to spend more money when I just paid for some brand new injectors.
What about the E-85 guys, how come we never hear anything from them??? I know they run 1200++ injectors. Don't they have the same problem as us???
going to 880cc injectors I hear are pretty stable with start ups. the values don't change to much. it sucks that we can't get a clear solution for this as it's annoying as hell. mine starts fine except when it's almost cold around 60 Celsius which falls in the 122 degree f. column. I had zeroed out those columns in the initial IPWs and cranking tables and she didn't want to start at all. it was pretty funny because I had just filled up and luckly I had the laptop in the car lol
So I guess there isn't any real solution for this issue right? I'm thinking that it could be something else that affect the injectors beause you have tried everything with just a little change.
i run e-85 with rc 1000's and i have the same issue. but its way better than before. all i did was lean out ur fuel table at 500 rpms a lil bit and it starts way better.... wish i had a cranking table tho
I'm testing this now, and I'l. let you guys know how it turns out. as of right now I have 15.1 plugged in at 500 rpms upto 90 load. one thing I noticed is that v7 rom does not include the 0 rpm column/row. looking at my log I noticed that while cranking it was below 500 rpms until it wanted to fire up.
This is definitely a fixable condition with the tables that we have defined.
The root cause of the issue (if you don't have any mechanical issues) is that their is too much fuel being added during warm start. You can easily test this by trying to start the car with the gas pedal pressed half way down or so. If it starts easier or quicker, then that's your issue.
The way to fix it has been mentioned here and a few other threads. But I think what some people may be missing are a few other IPW tables that need to be adjusted for the larger injectors. The main table you need to concentrate on is the cranking IPW table vs coolant temp (not sure the exact name, but I think it was linked to in this thread). You have to really lower the cranking IPW in the area of your warm start temp. Not to 0, but very close.
Now, since those tables only have a certain resolution that you can tune to, this is where the other tables (not sure again...it's been years since I dialed in my FIC 1250s) come in. Most of these IPW tables are not scaled per the injector size, meaning that you have to adjust them per your injector size. So, if you install injectors twice as big into your car, then you need to decrease all of the values by half to come to the same amount of fuel as before.
My best advice would be to read mrfreds advanced fuel thread and get all of the tables defined for your ROM and go from there. But, don't give up...it is definitely fixable if it's not a mechanical issue (leaking injector, faulty FPR, etc). It's simply too much fuel at that particular temp.
Edit: By the way, as of now, I'm running E85 exclusively, but tuned my 1250s on pump and E85. I did have this issue as well, but fixed it completely. Just for notes, E85 is a different animal as well, especially at lower starting temps. It needs much more fuel to be added.
The root cause of the issue (if you don't have any mechanical issues) is that their is too much fuel being added during warm start. You can easily test this by trying to start the car with the gas pedal pressed half way down or so. If it starts easier or quicker, then that's your issue.
The way to fix it has been mentioned here and a few other threads. But I think what some people may be missing are a few other IPW tables that need to be adjusted for the larger injectors. The main table you need to concentrate on is the cranking IPW table vs coolant temp (not sure the exact name, but I think it was linked to in this thread). You have to really lower the cranking IPW in the area of your warm start temp. Not to 0, but very close.
Now, since those tables only have a certain resolution that you can tune to, this is where the other tables (not sure again...it's been years since I dialed in my FIC 1250s) come in. Most of these IPW tables are not scaled per the injector size, meaning that you have to adjust them per your injector size. So, if you install injectors twice as big into your car, then you need to decrease all of the values by half to come to the same amount of fuel as before.
My best advice would be to read mrfreds advanced fuel thread and get all of the tables defined for your ROM and go from there. But, don't give up...it is definitely fixable if it's not a mechanical issue (leaking injector, faulty FPR, etc). It's simply too much fuel at that particular temp.
Edit: By the way, as of now, I'm running E85 exclusively, but tuned my 1250s on pump and E85. I did have this issue as well, but fixed it completely. Just for notes, E85 is a different animal as well, especially at lower starting temps. It needs much more fuel to be added.
Last edited by l2r99gst; Jul 27, 2011 at 06:28 AM.








