cuts out at 6,000

[junya1985]

Ok so i took my car to dino last weekend which it runs good but not perfect and I'm not saying anything bad about his work cause it's nothing he did wrong at all but were just trying to figure what it could be but under full boost full throttle my car cuts at 5800-6300 dino said it feels like an ignition cut so we put new plugs in it tryed different coils and still got the same thing has anybody else had a problem like this or has any idea what it could be.

Here's whats on the car
turbo back exhaust
intake
mpi-tuner
joe p fcd
pistons rods cp 8.5:1 bored .20 over
k1 rods
626 intake manifold w/egr pipe
10-12 psi on waste gate only

[Fudgie]

Was this a pre-existing condition prior to your tune or something new?

[dirtysouth_msp]

Ok so i took my car to dino last weekend which it runs good but not perfect and I'm not saying anything bad about his work cause it's nothing he did wrong at all but were just trying to figure what it could be but under full boost full throttle my car cuts at 5800-6300 dino said it feels like an ignition cut so we put new plugs in it tryed different coils and still got the same thing has anybody else had a problem like this or has any idea what it could be.

Here's whats on the car
turbo back exhaust
intake
mpi-tuner
joe p fcd
pistons rods cp 8.5:1 bored .20 over
k1 rods
626 intake manifold w/egr pipe
10-12 psi on waste gate only

Whoa, what the hell are you using that fuel cut defenser for if you are running an MPI Tuner? That is probably part of your problem right there. Members have experienced tons of problems with those, including some blown engines.

[junya1985]

well mpnick told me that it was a fuel cut so i'm not exactly sure if it was a prior problem but after i had it tuned by mpnick twice and it ran like crap i took it to dino and it ran so much better but that cut.

[Fudgie]

Does it cut at lower boost levels? 6 psi? Stock actuator?

[junya1985]

do not know yet haven't had a chance to turn the boost down yet has a new actuator on it so once i try that i'll let you know

[Kooldino]

Whoa, what the hell are you using that fuel cut defenser for if you are running an MPI Tuner? That is probably part of your problem right there. Members have experienced tons of problems with those, including some blown engines.
Negative, the issue is NOT the FCD. It's functioning perfectly. The FCD won't blow your motor, but using an FCD and not tuning for it can.

Here's a little more info:

Junya brought his car down, it ran like utter crap. I mean, I've seen some terrible tuning jobs come out of MP Nick's shop, but this one was one of the worst. It didn't idle right, it didn't cruise right, and don't even think about boosting it. I rewired it, tuned it, and it ran like it should. We proved this by beating the piss out of it for 2 hours straight.

The next day, I installed the 626 intake mani on his car. On our very first pull of the test drive, the power cut off around 6K rpm. No CELs, 11:1 Air:Fuel ratio. We've tried various solutions, and it still does this about 1/3rd of the time. It feels like the spark cutting out completely.

Cliff notes:
-Ran like a turd when it came to me
-Got it running right
-Put 626 IM on, pulled harder, but started cutting power at 6K RPM out of nowhere.

Mind you, this car was the first car that I left the turbo module in. However, it's only hooked up to power, ground, and the ignition wires at this point. One thing I'd like to try is removing the TM completely. Another thing I'd like to try is both lowering and raising the boost to see what affect it has on this issue.

We've also tried
-New plugs, gapped to .030"
-swapping wires
-swapping coils

No luck yet. Very odd problem.

[Jaysanooch]

What about a small leak in manifold somewhere? Would that cause the inconsistent cutting? Try pooring seafoam through you pcv line and see if smoke comes flying out from somewhere....to check for possible vacuum leaks. What do I know...just throwing an idea.

lol! Sorry, I'm all into Seafoam now, I bought a whole bunch and tried some this week for fun. I've seen a slight improvement with my car so far.

[Fudgie]

I would think taking the TM out would be the next step and see what happens. We all know how not so reliable those things are !! Can you route a timing light into the car so you can see if you are infact losing spark at that point while driving?

[Kooldino]

What about a small leak in manifold somewhere? Would that cause the inconsistent cutting?

I'd be suprised if it did. Generally an IM leak would cause you to throw a CEL for "system too lean/rich".

[Kooldino]

I would think taking the TM out would be the next step and see what happens. We all know how not so reliable those things are !!

I hear ya there.

Can you route a timing light into the car so you can see if you are infact losing spark at that point while driving?

That sounds scary. Might be able to pull it off on a dyno though.

[Fudgie]

Just hook it up, run it under the wiper arms and through an open window, or just packing tape it the windshield if your leads aren't long enough. Does the tach do anything weird when it cuts?

[junya1985]

no the tac doesn't do anything weird until today like in stead of the car just cutting like it used to it now it stalls for a second and picks right back up

hopefully tom. pull it in the shop turn the boost down and take off the Tm

[dirtysouth_msp]

Ok, so maybe its not the FCD, but it seems to me you would not need an fcd and its not doing its job. However, I do not know much about the MPI so I'll shut the F@#$ up now...lol.

[msp35]

Could you possibly be blowing out the spark?
It didn't do it b4 the IM so maybe the extra flow @ higher RPMs is
causing the spark to be blown out?????

[Kooldino]

Could you possibly be blowing out the spark?
It didn't do it b4 the IM so maybe the extra flow @ higher RPMs is
causing the spark to be blown out?????

That's my theory. That's the best thing I could figure out. That's why I asked him to turn the boost down to see if it still occurs.

He's running an .030" gap right now, so maybe going down to .022" or so could fix it, but I'd rather him turn the boost down first just to see what happens.

Alternately, as Fudgie suggested, he could hook a timing light up to it and go for a ride to see what happens.

[junya1985]

well as of right now i turned the boost down got it down to spike 10 hold like 9 than i went to turn down the wastegate more and stupid dropped the e-clip to the wastegate and lost it so i got a new pack from advance auto parts so i'll put it back on tom. also when i turned it down a little bit the first time it still cut

[junya1985]

got it turned down to about 7 pounds and let me tell you it feels so slow right now but i did a couple pulls and had no problems i did a second gear pull and 3rd gear pull had no problems at all as of right now still clue less on what it could be

[Kooldino]

Ok so far. Keep it up for a few days.

[Fudgie]

Is your maf relocated?

[Kooldino]

It's not.

[mspHtown]

any update on this problem?

[blthlt]

Yea, any updates? I have the same problem. I'm running the MPI with Nicks instructions. I have a GT28RS running 13 psi with a forged block, p&p head, p&p intake, and a gasket matchd stock manifold. I get a cut just like when I was stock and hit fuel cut. DINO PLEASE HELP me rewire this thing, removing the turbo module!!! PLEASE!

[Kooldino]

Yea, any updates? I have the same problem. I'm running the MPI with Nicks instructions.

Junya's problem had nothing to do with the MPI. I even pulled it out to prove that.

I get a cut just like when I was stock and hit fuel cut.

All of the cars that come to me from MP have that same issue.

DINO PLEASE HELP me rewire this thing, removing the turbo module!!! PLEASE!

Didn't Tony send you the instructions that I told him?


Anyway, Junya called me earlier today, and apparently fixed the issue. Apparently his battery has been loose for awhile, and he said something about a poor connection. He explained that when we'd go WOT on the car, it wouls slam the battery back since he didn't have it mounted properly, and it would disconnect and stall. He hasn't had a problem since he's fixed the battery. What an odd issue.

[junya1985]

Ok sorry i haven't posted it lately been really busy this weekend but yeah my battery tie down was loose and my battery did move back and hit the tie down and grounded out(not good) so i tighten the stuff back up and yesterday i drove about 160 miles and beat on it a good bit 4th gear pulls 3 rd gears pulls 1st 2nd and had no problems at 7 psi so I'm ordering a manual boost cont. this week from dino and were going to see what happens.

[blthlt]

Not sure, but this may be what my problem is/was. I ghetto rigged the battery lower that's the tray on top of it. The tray was under the battery to raise it so I could use the tie down. I'll have to figure out a better method later. These are large images so dialup may have to go play tidly winks.


HOOD (http://www.tateelectric.com/hood.JPG)
Battery (http://www.tateelectric.com/battery.JPG)

[xelderx]

Barry...let's just take your setup and put it in my car. My battery is in the back and well secured. This should give us a difinitive answer. I'll do some long term testing with it.

[Kooldino]

Justin is such a nice guy!

[junya1985]

OK well i got my boost cont. in and went to the track and got my battery in pretty good and so far not problems not a single cut at all so looks like the problem wasn't anything what we thought but just grounding out the battery all my fault oh well these things happen now i'm happy don't have yo sell the car woo hoo

[Jaysanooch]

That's good to here...I'm sure you and Dana will sleep alot better now.

[blthlt]

my problem still exists, this sucks. i know it's not the battery i've fixed that. i've ran ngk bkr7e-11's at .030, 0.28, .025, .022 and .020 to no avail.

i then have switched to zfr6 somethings gapped to .028 and still have the cutout at around 6k rpms. I will have a buddy ride along with a multimeter and see if the maf is seeing 5.0v or not. anyone have any suggestions? :)

[xelderx]

my problem still exists, this sucks. i know it's not the battery i've fixed that. i've ran ngk bkr7e-11's at .030, 0.28, .025, .022 and .020 to no avail.

i then have switched to zfr6 somethings gapped to .028 and still have the cutout at around 6k rpms. I will have a buddy ride along with a multimeter and see if the maf is seeing 5.0v or not. anyone have any suggestions? :)

Damn it!

[blthlt]

and I may have to lower the resistance in the joe p fcd some too, we'll see.

[xelderx]

What is the maximum amount of boost you can run without it cutting out?

[blthlt]

12ish

[blthlt]

UPDATE:

Went out today with a multimeter hooked up to the MAF wire and it only saw 4.8v when it cut out around 12.5 to 13 psi. So I know it's not "fuel cut". The FCD is doing it's job. I think I just have a spark issue. Any other ignition options out there? I still will try different gap settings. I'm at .028 right now I am gonna try .022 and see if that helps. I tried .020, .022, 0.25, .028 and .030 on NGKBKR7E I have ZFR6's in now so maybe the gap will cure the cut. Either way at 11.5 psi to 12 psi this mug pulls like a somebitch. I'll let you guys know the outcome of the spark gap changes. I'll have to do that tomorrow though the wife is making me to watch a movie tonight.

[xelderx]

Well...It's reassuring to here that it isn't a total dog. I've heard that the 1.8L coils are a little better than our stock ones, but no hard evidence. Might want to check into that.

[terbow]

isnt that guy in miami pushing 26 psi though. i know he has a gt25 but still, hes putting down alot more power and i dont think hes blowing spark.

[blthlt]

UPDATE:

Went out today with a multimeter hooked up to the MAF wire and it only saw 4.8v when it cut out around 12.5 to 13 psi. So I know it's not "fuel cut". The FCD is doing it's job. I think I just have a spark issue. Any other ignition options out there? I still will try different gap settings. I'm at .028 right now I am gonna try .022 and see if that helps. I tried .020, .022, 0.25, .028 and .030 on NGKBKR7E I have ZFR6's in now so maybe the gap will cure the cut. Either way at 11.5 psi to 12 psi this mug pulls like a somebitch. I'll let you guys know the outcome of the spark gap changes. I'll have to do that tomorrow though the wife is making me to watch a movie tonight.Anyone with any ignition info?

[Kooldino]

Just for grins, try a 5 series NGK plug.

Also, have you swapped plugs and wires with a buddy to rule out bad components?

[blthlt]

still using my wires and coils maybe i should try to swap...Justin what you doing sometime soon?

[xelderx]

still using my wires and coils maybe i should try to swap...Justin what you doing sometime soon?

I'll be over at the garage Wednesday working on the Geo. Stop by and you can try my coils and stuff.

[blthlt]

I'll be over at the garage Wednesday working on the Geo. Stop by and you can try my coils and stuff.ok, I'll try to do that.

[Myspeed12]

searchin around for some answers to why i get fuel cuts at about 5500-6000 rpm and this thread is somewhat similar to my problems...I just put a MBC on and im gettin fuel cut at around 7-8 psi at 5500, my freinds think i should get the FCD, but I'm thinking I'm goin to need to more like a new EMS to be safe from blowin my motor...I've checked my vac lines and it seems fine...what other reasons can it be.

[orng1]

You probably have a leak somewhere in the charge pipe ahead of the MAF. That's my guess.

[Myspeed12]

hmmm maybe a fuel cut defenser would help

[blthlt]

I redid ALL MY WIRING on my MPI setup and switched to a P5 PCM and between the two something changed my car. I no longer have the cut-out like I was before. I'm thinking that maybe a connection came loose and
was causing my PCM to wig out. MYSPEED12 what do you have as far as mods go to your car?

[mspHtown]

I redid ALL MY WIRING on my MPI setup and switched to a P5 PCM and between the two something changed my car. I no longer have the cut-out like I was before. I'm thinking that maybe a connection came loose and
was causing my PCM to wig out. MYSPEED12 what do you have as far as mods go to your car?


u running the map sensor now?

[Myspeed12]

I redid ALL MY WIRING on my MPI setup and switched to a P5 PCM and between the two something changed my car. I no longer have the cut-out like I was before. I'm thinking that maybe a connection came loose and
was causing my PCM to wig out. MYSPEED12 what do you have as far as mods go to your car?

I currently have Turbo back, injen cai, upgraded smic, hks bov, engine mounts, MBC set at 7-8psi currently, cold and hot pipes

[blthlt]

u running the map sensor now?I will be. I rewired it to the MPI default wiring to try and rule out any issues so now I'll rewire it for MAP tunning and see where that leads me.

[blthlt]

I currently have Turbo back, injen cai, upgraded smic, hks bov, engine mounts, MBC set at 7-8psi currently, cold and hot pipesYoull definately need something to help you from cutting spark with your added airflow. What are your plans for your car, in the end where do you want it to be?

[Myspeed12]

up or around 230whp, so my next step with this DSM AFC is to boost it up to 10, turbo manifold and intake manifold it.

[blthlt]

sounds like you have a good plan. the afc is a good choice and it will eliminate the cut out.