Lately I have been getting hicups from doing full throlte sints in second and third and fourth. Seems like the engine just cuts out?

I had new pluggs replaced about 1,000 miles ago, ngk 7's.

I have a dynoflash mail in, tbe , walbro 255, hks rs intake.

This last time it did the hesitation/cut out I could smell alot of cataltic smell?

I have read that using a step colder plugg ngk 8's has helped and that tightening the coil pack nuts has helped also.

Im running about 1.4-1.5 on 92 octane. 2003 evo with 38k on the clock.

Also I have seen that you shouldnt regapp the irridium plugs that they might break. And others that do regap them? What tool are they using to regap these pluggs?

Any other Imfo would be great........ maybe I just need to turn the boost down to like 1.4 or so?

Thanks

 

well I turned it down to 1.4

still did it ever so slightly.

Going to mix some 105 race gas with the 92 and see if it takes the cut out away. Other wise think I will try the step colder pluggs.

Any other ideas

 

Are you using Magnacore wires?

 

To much boost- hitting fuel cut ... You tuned @ all?

 

Yes, he's tuned. Read his post.

Silvrevo:

1) No, do not re-gap iridiums
2) Put in a fresh set of NGK BPR7ES gapped to .026
3) Please explain what you mean by "hiccup." We don't even know if this is fuel cut, because you haven't even explained what's happening yet. Explain EXACTLY what is happening - give every detail.

 

Didnt think you would respond to this but..... Just as I said,

Lately I have been getting hicups from doing full throlte sints in second and third and fourth. Seems like the engine just cuts out?

When I mash the gas and it just cuts out at about 5-7k rpm,, does it a few times.

Kinda like vrooom varoommm vrrrmmm, cut cut ,, varooommm cut varoommm.

Like less than half a second cut out then back into the revs.

Plugs are about 2 months old NGK BPR7ES ,,, How ever I would LOVE to know exactly about the gap on these? I guess you just have to trust that they are around .026 out of the box right. Because re gapping these are not recommended. And if they are all slightly different, then what do you do?

Would going a step colder help,, use the 8's?

Also wires are stock,,, everything dynoflashed, mail in.
Maybe I have just have gotten bad gas,, I didnt have a chance yet to mix race gas in yet.

Thanks

 

What??? No, you don't trust that they are .026 out of the box, hahahahaha. Jeez, no way. They could be .041 or .021. They are supposed to be pre-gapped, but who knows where they gapped them. NGK doesn't know we need them at .026. We aren't the only car who uses them. Who said regapping is not recommended? That's only on Iridiums, which are BPR7EIX, not BPR7ES. If you have BPR7ES, then they are copper and can be re-gapped all day long.

No, do not go a step colder unless you're running 25+psi on alky injection all day long.

Race gas is not the solution.

I still don't understand the hiccup thing. You haven't explained it for real yet. You only gave a range of 5-7k. Is it at 5k...6k...7k...where is it? Does it completely shut down the car and feel like hitting a brick wall or are you just sputtering. I still can't tell from your description if this is fuel cut or not.

 

Opps wrong part number,, I do have the Iridium plugs in now,, and have always used them.. Just used the wrong part number.

So going with the copper pluggs gapped at .026 might be a better bet?

And when it sputters and cuts out, it is around 5,000 rpm and up.

So using non iridium plugs could help out? I didnt know that one.

thanks

 

It's not that non-Iridium help. Iridium plugs are great. However, you need to make sure your problem isn't your current plugs. Copper NGK BPR7ES are only $1.40/ea, so you can buy a set of 4, gap them to .026, try them, and not care if they don't help, because you only spent $7 and a few minutes of your time. It's the safest, cheapest, and easiest way to troubleshoot something like this. If the problem persists, then we can move forward. Another easy thing to do is switch plug wires with another Evo that has no problems. Easy, quick, free troubleshooting step.

Now, is it sputtering or cutting out. YOu keep changing it. It can't sputter AND cut out. You say it starts at 5k, so you mean it sputters all through the powerband in each gear above 5k rpm? If it were fuel cut, it would just hit a brick wall and cut out completely. Doing this multiple times causes the P0234 overboost code usually. If you are sputtering, that's usually related to spark, which is why I suggest doing the plug change and/or checking the plug wires.

 

Yea I guess its a sputter more than a total hitting a wall thing.

I did turn the boost down to 1.4 bar.. I will try out the plug change and see if that helps.

Thanks

 

Do the plug test ASAP. I've dealt with this at least 10 times where the came back with a huge grin on his face telling me how happy he was that his car ran so well now for only a $7 fix. This may not be the same for you, but it's sure worth the $7 to find out...

 

turn ur boost down all the way to see if it's an over boost... if it still does than its somehting else