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I have a 98 Vr4 gallant with a DOHC 2.5 twin turbo 6A113TT.

Customer Question
Hi I have a 98...
Hi I have a 98 Vr4 gallant with a DOHC 2.5 twin turbo 6A113TT.
JA: What year is your Turbo?
Customer: 1998, the car stumbles and will not accellerate and back fires, i disconnected the MAF and it goes very well untill it figures out that the MAF is not connected then goes into limp home mode..the fuel pump has been replaced already but im leaning towards a fuel pump module. does this car have one? i dont have a shop manual
JA: Have you ever replaced the fuel pump, or is this the original?
Customer: its new
JA: Are you fixing your Turbo yourself? What have you tried so far?
Customer: 1998, the car stumbles and will not accellerate and back fires, i disconnected the MAF and it goes very well untill it figures out that the MAF is not connected then goes into limp home mode..the fuel pump has been replaced already but im leaning towards a fuel pump module. does this car have one? i dont have a shop manua
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 year ago.Category: Mitsubishi
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Answered in 10 hours by:
9/5/2016
Mitsubishi Mechanic: Chris (aka- Moose), Technician replied 1 year ago
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Mitsubishi
Satisfied Customers: 49,979
Experience: 16 years of experience
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Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.working after noon till just after midnight.

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Customer reply replied 1 year ago
Waiting for your answer
Mitsubishi Mechanic: Chris (aka- Moose), Technician replied 1 year ago

Are you getting any trouble codes?

Have you monitored the fuel pressure?

Is the MAF sensor reading correct?

Is the back fire out the intake or exhaust?

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Customer reply replied 1 year ago
Unfortunately we're back to basics in this one. I got the car as a wreck that everyone gave up on...I have tried different code readers but they can't communicate.The car idles rough and is almost undeliverable due to lack of power backfire from exhaust...if you can get it to a WOT situation it can actually fly! Disconnecting the MAF smoothed out idle and the car now accelerates perfectly and runs great until the PCM figures out what's going on and the car goes to limp home mode.The fuel pump was bad and has been changed....fuel pump relay was overheated along with wiring which has been repaired.The MAF was replaced with a new one and no change.I suspect that if the car has a Fuel control module that gives the pump a PWM signal then this maybe giving us the lean condition of the unit is bad...Does this model have that fuel pump control module?? Any part numbers
Mitsubishi Mechanic: Chris (aka- Moose), Technician replied 1 year ago

Can I get the vin#?

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Customer reply replied 1 year ago
PAEEA5ASRXA000322This is a Japanese 4wd rally car that made its way into Germany and New Zealand ....unbelievably this one was assembled in the Philippines and that's where it is now
Customer reply replied 1 year ago
1996–2003 Mitsubishi Galant/Legnum VR-4 — EC5A/EC5W
Mitsubishi Mechanic: Chris (aka- Moose), Technician replied 1 year ago

I need to opt out on this one. I have no information on this car.

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Mitsubishi Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 23,526
Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
Verified

Hello and welcome to JustAnswer!

Lack of fuel pressure is a definite possibility but I wouldn't recommend replacing the fuel pump or other parts without confirming it has failed. If it runs fine under wide open throttle though fuel pressure isn't a likely cause as fuel demand is higher then. A scan tool is most likely going to be necessary to accurately diagnose the problem.

Has fuel pressure been tested at the time the problem was happening?

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sprinkles08
sprinkles08
sprinkles08, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 23,526
23,526 Satisfied Customers
Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience

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