[itbettergofast]

Thinking about buying the BMS meth kit, I already have the jb4, er cp and synapse but a couple of weeks ago my car threw the half engine light, took off all the mods took it to the dealer, they replaced hpfp and 2 injectors, got the car back reinstalled all the mods, on first startup half engine light, found two codes, erased them and it was fine for a week, then the other day started car got half engine and reduced power, thought it was hpfp again so took off all the mods and drove to dealer, dealer had it for two days but could not find anything wrong.

Im now thinking the jb4 is triggering the light, car runs great without it, anybody else noticed that the jb4 connectors look like they might disconnect with bumps on the road? Like they dont have a safety clip to hold them togheter, could they be making false contact for being loose?

How reliable is your tuned car? And what tune do you use, anybody have a bulletproof meth spraying car that is always running good?

[scottp999]

Afraid to say it without knocking on wood, but I ordered my tune before the car was made on the line in Germany. It went in at 700 miles and has been in for over 4 years with no mechanical problems.

My car is not my daily driver though, it mainly lives in the garage and I put about 4500 miles a year on it.

If you have not already contacted them, the JB support is very timely and I'm sure they would help you get to the root cause.

[tibra1]

My car has been extremely reliable w a GIAC refalsh tune..no codes, no limps..Have you considered switching tunes?

[BQTuning]

The name speaks for itself with warranty

[plague]

havent had my car for that long yet, but i daily drive it and ive got full bolt ons. meth set up reserved and going in the car as soon as vishnu gets the pumps in.. car runs great, never had a single light, nothing, loving the car.

[s2k_335i]

35K on tuned with JB3 and Procede. No engine issue yet.

[secretsquirrel]

Are you not pulling codes when you get a half engine light? If not, you should be, then you would be doing much less guessing.

And to answer you question, about 30k with procede. 1 HPFP replaced at 5x,000 miles.

[Trojan4evr]

Originally Posted by tibra1

My car has been extremely reliable w a GIAC refalsh tune..no codes, no limps..Have you considered switching tunes?

GIAC is one of my favs. Extremely great tune.

[Mike@N54Tuning.com]

Originally Posted by itbettergofast

Thinking about buying the BMS meth kit, I already have the jb4, er cp and synapse but a couple of weeks ago my car threw the half engine light, took off all the mods took it to the dealer, they replaced hpfp and 2 injectors, got the car back reinstalled all the mods, on first startup half engine light, found two codes, erased them and it was fine for a week, then the other day started car got half engine and reduced power, thought it was hpfp again so took off all the mods and drove to dealer, dealer had it for two days but could not find anything wrong.

Im now thinking the jb4 is triggering the light, car runs great without it, anybody else noticed that the jb4 connectors look like they might disconnect with bumps on the road? Like they dont have a safety clip to hold them togheter, could they be making false contact for being loose?

How reliable is your tuned car? And what tune do you use, anybody have a bulletproof meth spraying car that is always running good?

You read the codes and react based on what they are. If it's a fuel pressure code you either have a fuel system problem (likely) or a hardware/wiring harness defect (unlikely). If you think you may have a hardware/wiring harness defect you can always ship the JB4 in to BMS for testing.

Mike

[Wild Squid]

I think different cars react to tunes differently. One 335i may go years without a problem with a tune and another 335i may break down easily with a tune. It's just hit or miss. I really don't think its something that can be diagnosed.

[itbettergofast]

Ive read the codes when the light comes on and this is what I get, Codes 2a7c and 3100, as a matter of fact dealer saw these codes but said they were not present and it was a one time thing, ive thought about changing tunes but ive heard more positive stuff about jb4 than negative, cobb would be ideal due to how easy it is to install-uninstall but ive read alot of negative about it.

[sunnydshine]

my 08 sedan is my daily driver. I had the ess stage two tune before and it never gave me any problems at all. I switched my setup to the proceed and with their progressive meth kit. still no issues here

[s2k_335i]

I met a guy in NC who experience issue with his car when he put in a tune. These 335 is a hit and miss. After 4 fuel pumps, four set of spark plugs, two set of coils, two set of injectors, new turbos, this car been serving me well...

[vase330]

What the heck dude are you my lost twin? My car has gone through exact same thing. Just got my second pair of Turbos and all is good I hope. I used to live in Plano back in late 90s, and like you also lived in NJ for a while. What a coincidence.

[Litos]

i honestly don't think the tunes are the problem, regardless if you go with GIAC, Cobb, JB4, Procede, etc.

it's the damn sensitivity of the car and the terrible fluel system.....

[Mike@N54Tuning.com]

Originally Posted by itbettergofast

Ive read the codes when the light comes on and this is what I get, Codes 2a7c and 3100, as a matter of fact dealer saw these codes but said they were not present and it was a one time thing, ive thought about changing tunes but ive heard more positive stuff about jb4 than negative, cobb would be ideal due to how easy it is to install-uninstall but ive read alot of negative about it.

The first one isn't a real code. 3100 always comes with a problem code like 2ABC, 30FF, 2A87, etc. But if you think it might be wiring or box related just send it back in to BMS for testing.

Mike

[tibra1]

Originally Posted by Wild Squid

I think different cars react to tunes differently. One 335i may go years without a problem with a tune and another 335i may break down easily with a tune. It's just hit or miss. I really don't think its something that can be diagnosed.

+1 and I think this is more of the case with piggys than reflashes..

[secretsquirrel]

Originally Posted by Litos

i honestly don't think the tunes are the problem, regardless if you go with GIAC, Cobb, JB4, Procede, etc.

it's the damn sensitivity of the car and the terrible fluel system.....

[BobS]

Been running great for 2 years and 20k miles on my GIAC flash. This car has been great though, only one HPFP issue the whole time i've had it. No other issues. My mileage is at 48k right now. Knock on wood*

[mithiral67]

Bought car with 8 miles.

New hpfp at around 1,500 miles (only noted long crank times and wanted it checked before a tune)

jb3 for 200 miles

sstt for 22,000 miles

Procede v4 2,000 miles

Cobb for 3,000 miles

New hpfp and 4 injectors under recall (did get a half engine light after a 0-120mph run, fuel pump codes, I was getting longer crank times for over a year, but thought it was the new dme software, after the new pump, fires up with no crank time now)

Cobb for 5,000 more miles and no other codes or issues.

[Jake.M18]

08 with almost 40,000 mile on it now put the tune in at about 33,000 and im running an ESS stage two and it runs beautifully had the pump go once changed it with some injectors and nothing to worry about from there knock on wood.