Stumbling on E85

raybythelake8445
Posts: 4
Joined: Sat Sep 24, 2016 2:28 am

Stumbling on E85

Postby raybythelake8445 » Sat Sep 24, 2016 2:43 am

Running a Platinum Sport 1000 with Haltech FlexFuel Sensor in a 2004 Toyota MR2 Spyder with Garrett GT2560 turbo running about 9-10 lbs boost in an otherwise stock 1.8L engine. Injectors are 700CC Deatschwerks units with a DW300c fuel pump. Engine is equipped with an oil catch can.

Since installation and tune by Steve at RDP Motorsport here in Ohio USA, a native Aussie who used to work at Haltech, I consistently experience stumbling, hesitation cruising on the highway. Doesn't seem to matter what rpm I'm running — 2500, 3000, 3200 — I'm getting this slight shuddering I can feel. Spark plugs are brand new and coils test OK so I'm assuming it's something in the map or injector/fuel pump responding to the map that's causing this.

What would be the best approach to getting this rough running issue sorted? Have the tuner contact Haltech directly? I don't believe this model ECU does data logging, but if it does I could forward that Haltech HQ for review.

Thanks in advance for any assistance on this.

Ray

raybythelake8445
Posts: 4
Joined: Sat Sep 24, 2016 2:28 am

Re: Stumbling on E85

Postby raybythelake8445 » Sat Sep 24, 2016 11:30 am

I'll be away from the computer until Sunday evening. So if anyone responds to my post, I won't see it until then. Cheers all.

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HaltechMatthew
Haltech Staff
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Re: Stumbling on E85

Postby HaltechMatthew » Fri Sep 30, 2016 10:00 am

It does do logging, and talk to the tuner.

Common causes for what you are reporting:

Trigger not wired correctly, or incorrect edges chosen. Miss Counter will be increasing.
Transient Throttle false tripping. Noisy TPS signal, not enough filtering, dead band too low.
Too Lean. Check AFRs


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