EECTuning.org

Chris Mureen

A small difference is normal, but yours is quite large. A small exhaust leak can often cause the issue that you see.

Chris Mureen

I don't know that a different computer/strategy will buy you anything worth the effort. Perhaps if you had a 96-98 Cobra engine with IMRCs, but even that would be marginal. I'd stay with what you have and tune the new engine and config.

Chris Mureen

One suggestion that you might try is resetting the EEC. I've seen weird behavior before when the KAM gets corrupted. Not sure if you've tried that yet.

Chris Mureen

One other wild idea. Have you played with DFSO in your tune at all?

Chris Mureen

I glanced over it and still come back to my other response. I don't know what others with your combo are running for spark, and I have a 4V, but mine couldn't handle that level of spark (38 degrees) without misfiring at that load level. It would be an easy test to just take 5 degrees out globally an...

Chris Mureen

You made a brief mention of spark. I had a similar issue and it took years for me to figure out that I was running a little bit too high of spark at low loads. Lowering my spark solved it.

Chris Mureen

The EEC will always use the lowest aggregate spark when all adders are included. If you want to have it ignore one of those tables then raise the timing to amounts that are higher than the table you wish to use. Again, don't forget the timing adders though because there is more than just the table t...

Chris Mureen

Took a quick drive tonight with EGR turned off - no bucking! Switched to the tune with EGR enabled - instant bucking! Datalog shows 30-35% load, 1200 rpm in 5th gear... Maybe EGR is the key (will continue trials)... I was just scanning these older threads and came across this post. I have been stru...

Chris Mureen

I was having issues this morning flashing a new tune and after the last attempt the fluel pump stayed running. I tried everything I could think of (reflash, different program, different switch position, reset EEC) and finally removed the tweecer and the problem stopped. It doesn't matter which switc...

Chris Mureen

Okay... I did some logging this afternoon and discovered something. While it does go lean at first, it then goes rich and "pulsates" lean to rich. My MAF flow pulsates at the same rate also. This means while decelerating in gear my blower is causing increased flow as compared to what I am using. Per...

Chris Mureen

Okay... I understand that but my offset is about 1/2 the setting of stock and pretty small. According to my wideband, when I decel my a/f goes a couple of points leaner, not richer. My struggle is the understand how that will lean me up much or solve the problem. So I am at 14.5:1 and take my foot o...

Chris Mureen

Yep, I have cats. So is the thought that by lowering the injector offset I am reducing the fuel when decelerating? How does that reduce the fuel while decelerating?

Oh and my wideband is before the cats.

Chris Mureen

Hey Guys, Been a while since I posted last but I've dusted off the beast and was starting to do some tuning again. I've got an interesting problem I can't figure out so I thought I'd post here and see what you think. I am running stock fuel tables with the exception of WOT fuel changes. My injectors...

Chris Mureen

I have a friend with a 96 cobra that had a NOVI2k on it, it certainly had the potential to make more power than my car but in his case it felt noticeably less strong down low. It's not that big of a deal since with gearing you can reduce that (he had 4.10s). Now with an automatic I'm sure it would ...

Chris Mureen

Relative TP is not set at key on, the eec constantly adjusts the closed TP position downwards so that the various thresholds are not affected by the closed throttle value varying thought out the run. Are you saying that you can adjust the throttle opening and thereby increase or decrease TPS voltag...

Chris Mureen

Adam McLaughlin wrote: My experience with THIS practice has led me to believe that there is an observation made from the "ratch" position of the EEC when the computer is first turned on to run.

Adam

If the EECIV is like the EECV, then you are correct. The relative throttle position is set at key on.

Chris

Chris Mureen

Sad news..... Yes about emotions...many forums have ugly shout-fests but I have been very pleased that it doesn't happen here. Lets don't start now. WRT the TPS, it sounds like what is being described is like how it is in the EECVs. However, there are two things that make it hard for me to accept. 1...

Chris Mureen

I couldn't guess at the new URL and it wasn't as simple as changing from "Webhop" so I just downloaded again.

If you want to edit the setting.xml file then the new URL should be
http://eecanalyzer.net/be/
and
http://eecanalyzer.net/ea/

You will still need new reg codes.

Chris

Chris Mureen

Yes, I know how to build one. Just need to look up the MAF wiring. I guess you'd need to address both elements.

I don't think any MAF actually pegs until well over 5v. I think the EEC pegs. As I recall, the newer slotted MAFs will output 14v if you flow enough through them.

Chris

Chris Mureen

sailorbob wrote:Or you can just buy yourself a couple of resistors, make a voltage divider circuit up and save yourself $180.

That is an interesting option and I wonder why more folks don't do that instead of getting new MAFs. How would you wire that up?

Chris

Chris Mureen

I did the same thing but pulled my Alternator fuse. I was able to run it down to 8v before the radio even stopped working. I stopped there and assumed it was good enough. Turns out I already had the right slope down to 11v but once it went below there I got too rich so it helped. It is amazing how f...

Chris Mureen

My recommendation is to use whatever has worked well with others for Injector Offset. As well, I'd recommend running an Injector Offset calculation in EA on an idle-only log that has various voltages with no electrical load, all the way to a disconnected alternator with high beams, blower motor, an...

Chris Mureen

Well it has never suggested that my slopes were reversed. Keep in mind that I have very little resolution left if I get close to stock offsets. At 13v my stock 24s were set at .66ms. I just raised them to ,42ms but would be nervous about going larger. As I mention above, when I was over 1ms the MAF ...

Chris Mureen

Your theory makes sense. I have these RC 52s and my HS is set at 52 and LS at 59. I have struggled to get my trims acting right and knew there was likely issues with the slopes/breakpoint/offsets. Given that these were all guesses, I am not surprised. Running EA, it is really confused and has not be...

Chris Mureen

I found when I was testing yesterday that I could take my MAF flow down to 15 kg/hr and it still held at 25% too rich at idle when I put 1.4ms in the offset function for my injector. This tells me that there is some amount of allowance between injector firing that is included with the other timing e...

Chris Mureen

If this data is right then those injectors wouldn't work for most vehicles. My plusewidth at idle is about 1.7ms. I tried 1.4ms for the setting and my MAF no longer affected the tune. I was running 25% rich at idle no matter how small I made the flow. I dropped a note to Clint and he thought those n...

Chris Mureen

I am running RC 55lb (550cc) injectors. One issue I have had is that no one has the inj comp battery voltage for these injectors so I have had to guess. For simplity I have just taken the ones I could find for 60s and recently started reducing it more. I just got an email (finally) back from RC that...

Chris Mureen

The bypass should be open while cruising. This reduces pressure into the TB when you aren't requesting it. I have seen where MAF backwash from the bypass can cause erratio flows. Make sure that isn't happening.

Chris Mureen

Those are the same ones I was looking at. I will make up my mind in the next few days as to what I will do. What is your fuel economy like? I can drive like an old lady and still only see 12mpg for combined hwy/city and rarely going above 3000rpm. I think my problem is the fuel is always too rich or...

Chris Mureen

Bob - good luck with your new set up. With my suck through MAF I ended up with 2 bypass valves. One on each side of my IC core. One is a little bigger than the stock bosch and the other is a mini race bypass that flows a bunch. The core is out now and only a straight pipe remains but I still need tw...

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