Typhoon backfiring under WOT

T

Topher.

New member
Hoping I can get a little help from you guys as I'm generally new to my Typhoon (1 year).

The truck has been backfiring anytime I'm at wide open throttle and full boost (14lbs on a 20G) since bringing the truck out for the Spring. I don't think it's engine knock because it doesn't show up on the indicator on the Ultimate Chip (gauge) at the time of backfiring. I did notice a large black cloud behind me after this happened one afternoon so I decided to give my ignition system a refresh. Replaced coil, cap and rotor, wires, and plugs (gapped to .027). It seems to have done nothing.

The truck has 50# injectors and Fuel Pressure shows at 42 at idle.

Some extra info, if I keep throttle around 75% or so i can still hit 14lbs without any issues but as soon as I go all the way into it the truck pops like a gunshot and loses power.

Any help is much appreciated, hope I posted in the right area.
 
Ty92Resto

Ty92Resto

Member
Re: Typhoon backfiring under WOT

If someone doesnt know off the top of their head, where about do you live? Maybe someone local has a PC and tuning software to get the engine configuration and whats happening at WOT.
 
RealFastV6

RealFastV6

@jb_and_his_coffee
Re: Typhoon backfiring under WOT

Logging it would be good, but in the meantime doublecheck your timing; and if that's not out of whack then I'd probably throw an ignition module at it before I went too much further.

:tup:
 
Jimmy

Jimmy

Banned
Re: Typhoon backfiring under WOT

On the first very first #50 chips there was NO knock retard because those ******s were tuning a Braphoon and then sent out a dumb chip,with KR disabled.
 
wildphil

wildphil

I Love My Ty's
Re: Typhoon backfiring under WOT

When you say 14lbs of boost are you using the factory gauge only or also a data logger? It kinda sounds like you are overboosting and the ECM is cutting the fuel off. Are you getting any error codes?
 
T

Topher.

New member
Re: Typhoon backfiring under WOT

RealFastV6 said:
Logging it would be good, but in the meantime doublecheck your timing; and if that's not out of whack then I'd probably throw an ignition module at it before I went too much further.

:tup:
Click to expand...

I did check timing, disconnected the brown wire on the ECM and everything was good. I do have another ignition module.
 
T

Topher.

New member
Re: Typhoon backfiring under WOT

wildphil said:
When you say 14lbs of boost are you using the factory gauge only or also a data logger? It kinda sounds like you are overboosting and the ECM is cutting the fuel off. Are you getting any error codes?
Click to expand...

Not using the factory gauge but that is an interesting point because it does seem like it could be fuel cut. First time it happened was on a downshift and it was immediate. Maybe turn down the boost and see what happens at WOT?
 
S

Syclone22

Member
Re: Typhoon backfiring under WOT

Backfire can be running lean or spark blow out
do you have a wideband sensor installed ???
What kind of plugs are you using ??? ;)
 
wildphil

wildphil

I Love My Ty's
Re: Typhoon backfiring under WOT

Are you using Datamaster or another data logger? Are you getting any error codes?
 
T

Topher.

New member
Re: Typhoon backfiring under WOT

No wideband, spark plugs are NGK UR6 gapped to .027.

The data master the previous owner had gotten doesn't seem to work, won't read the truck. Looking to get a new program.
 
T

Topher.

New member
Re: Typhoon backfiring under WOT

Jimmy said:
On the first very first #50 chips there was NO knock retard because those ******s were tuning a Braphoon and then sent out a dumb chip,with KR disabled.
Click to expand...

How can I tell if it's one of the first chips? On mine it has a small red indicator light that flashes during detonation.
 
powercat6

powercat6

Active member
Re: Typhoon backfiring under WOT

Is your MAP sensor a 2 Bar or a 3 Bar?

An Ultimate chip requires the use of a 3 Bar.

Also are you sure your Ultimate chip was burned for 50# injectors?

There were also Ultimate chips made for the stock injectors.
 
T

Topher.

New member
Re: Typhoon backfiring under WOT

fivetodrive said:
Running too rich with an exhaust leak can cause a backfire as well...
Click to expand...

Never heard that before but I'll check for a leak tomorrow. I'd like to think I know my truck pretty well but a 3" straight piped from turbo back..not always easy to hear if you have a leak while driving lol.

powercat6 said:
Is your MAP sensor a 2 BAR or a 3 BAR
Click to expand...

3 bar
 
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