V1 Joe's 2009 F40 SS/TC #470

[comegetjoe]

If you have the egr valve plugged in then it’s long term plus short term trims. Long term on LNF is very basic and is an average over the entire throttle/tpm range. You can look at the short term trims in areas that are breaking up and see if those numbers are out. 5% out is ok, but 10% is something you can feel for sure,

I hope your tuner is familiar with the LNF and is not a LS or all around tuner. LNF/E69 is its own little world.

ZZP, Matt specifically is tuning the car. I e heard good things and I've seen the negative posts on FB, but tuning was part of the head/cams package, so Im going to roll with it.

 

[pisco]

ZZP, Matt specifically is tuning the car. I e heard good things and I've seen the negative posts on FB, but tuning was part of the head/cams package, so Im going to roll with it.

Matt is doing my tunes and I have been very happy with results this thing screams

 

[comegetjoe]

Rattle update - single mass in an F40, apparently its normal.

 

[Traé]

Ive not seen anything on how to mount the windshield, but you guys were right. I had to enlarge one hole, put the hood on the ground and the holes lined up for the bracket onto the hood. The windshield itself matched up spot on.

Got the new wheels on. World of traction difference between the Cooper street tires on the SS wheels and the r888r on the Cosmis wheels.

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Is the swaying after a high load into decel normal for a goblin? Its like its settling down from being out of sorts.

When are you coming to Delaware, OH so I can see this sombitch?

 

[comegetjoe]

Not this year. With baby #2 due within 2 weeks from this post, Ill have 2 under 2 years old and Ill have my hands full. My wife's been a trooper the past few weeks, letting me spend some serious time out there on the car wrenching, so I can actually drive it when time allows.
Hopefully next year Ill be able to make it out to some events, shows and meet up with some of you guys.

 

[Desert Sasqwatch]

Early congratulations on baby number 2!

 

[comegetjoe]

Spark plugs. What are you guys running on your modded LNFs? Gaps?
Before today's trip we gapped the stock replacement NGKs to .030, saw this (pic), loaded the tune revision and continued on. Still same results as the last revision.

 

[Mahkoi]

Spark plugs. What are you guys running on your modded LNFs? Gaps?
Before today's trip we gapped the stock replacement NGKs to .030, saw this (pic), loaded the tune revision and continued on. Still same results as the last revision.
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I'm running NGK LTR5IX-11 I think I'm at .028 (maybe .026) I was playing with gaps when I was having spark blowout and cant remember what I settled on. My blowout was self inflicted. I didnt check the gap when I put them in because the box had a little no gap symbol on them. Had high rpm/high boost issues and when I pulled them they were at something like .044. Brought them down to .032 and it was way better but still there a little bit. It was gone when I took them to .028 (or maybe .026)

 

[comegetjoe]

Tuner recommended factory plugs, so I ordered some and put them today (.028) and no change in the way the car enters boost and breaks up. Scott didnt feel as a passenger what i felt driving, so he asked me to stay on it a bit longer. The car was NOT happy. I got a flashing c.e.l. misfire codes on all 4 cylinders in codes and it sounded like it was down a hole for about a 1/4 mile. Im not sure if it cleared up or the flashing c.e.l. went away. But it began to run normal again, still breaking up into boost though.

Is .028 too large?
*also, I was wrong, I had AC Delcos in previously as well. So were on set #2 at the moment.
What coils are you guys running? I have NGK coils.

 

[Mahkoi]

I'm on OEM coils that were in my donor car. You are more modded than me tho, I'm stock except for studded head, 3bar map, and the lnf tune thats floating arount the forum so im not sure how helpful my input will be. Did it set any other codes other than the misfires on all 4?

 

[Desert Sasqwatch]

My take on your further symptoms- misfire on all 4 coils at the same time is electrical. Voltage falling off and the coils are not coming to full power before discharging into the plugs. All 4 coils can't be bad at the same time. Did you add a dedicated ground from the head to the post at the fusebox? The 12v hot feeding the coils is split in the fusebox, is the common source in the fusebox connected to the hot source good - reading the same voltage as at the battery?

 

[ah.b.normal]

My take on your further symptoms- misfire on all 4 coils at the same time is electrical. Voltage falling off and the coils are not coming to full power before discharging into the plugs. All 4 coils can't be bad at the same time. Did you add a dedicated ground from the head to the post at the fusebox? The 12v hot feeding the coils is split in the fusebox, is the common source in the fusebox connected to the hot source good - reading the same voltage as at the battery?

I'm Not Sure IF you can have too many grounds?? I've not worked on systems really under stress beyond stock. I've always heard that electricity always finds the best/shortest path to ground, If a skinny ground is good a fatter one is betterer! Myth? Maybe?........... I always recommend a high fiber diet(I.E. 12+ Y/O Scotch), eat desert first/salad last and ground all the things.

 

[comegetjoe]

Wits end here boys.
My ground thats by the trans was loose. So I added a ground cable 2/0 to that ground, to the head and tightened everything down and I still have the same problem where it drives fine until boost comes into play. And now its popping under decel. Sounds like small fire crackers in the muffler, like **** if im honest.

Matt has told me
1. Factory plugs. Check.
2. That factory coils are good to 600 hp. Ill try this in an hour or so

That's it, no help. No.... check this. No, maybe you should do this. Silence unless its about fuel trims.

How long do I have to drive this before the computer knows what's what? I feel like it should know not to break up from the start.

 

[Gtstorey]

At some point I would look at maybe paying a different tuner to review your setup and logs. Unfortunately, the LNF e69 is so different it might be hard to find anyone else to review it. You might try posting on the HPT forum, but the GM I4 section doesn't get much traffic.

 

[Gtstorey]

You are making sure the gas tank is kept full? I did have a round of tuning go wrong because the tank was a little low causing a miss.

 

[comegetjoe]

I filled it up today and it only took 2.5 gallons before it clicked off.

 

[comegetjoe]

Scott and his experience had looked over some of the logs and done some Scooby-doo-ing. Something I only have a limited understanding of, but the Lambda is somewhere around 1.1 getting into boost, that's a pretty high AFR according to a conversion table I've seen. I've asked the tuner to look at the file again. Im really hoping that he comes back with an adjustment.

 

[Gtstorey]

Direct injection engines like to be leaner than port injection and I’ve heard than washing the walls with gas can be worse than running a little lean. But 1.1 does sound lean. It’s been a while since I’ve looked at my tune. It is lambda and not equivalence ratio (inverse of lambda)?

 

[Ross]

Yikes! The AFR should be getting rich if you are getting into boost, and yours is getting lean. I had multiple air leaks in the intake and vacuum system that caused my engine to run lean, and made my fuel trim tables go rich. Ever smoke the intake?

 

[Goblinfanclub1234]

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I would put a bead on all of the boost tubes Can't imagine they will stay put without one. I used a modified harbor freight 9-1/2" wire crimping tool and some forearm muscle on my tubes.