I have a 2004 Baja. Severe hesitation and power loss on acceleration then kicks in and revs. My mechanic can't figure out what it is and brought it to Subaru dealership. They replaced solonoid and said they weren't sure but the next thing would be the turbo. It's driving worse then ever. In fact it isn't safe so I've stopped. Only 50k miles on it!!!!! Could this ce catalytic converter or MAF sensor?
Country: United StatesMake: SubaruModel: Baja TurboYear: 2004
Mechanic couldn't fire it out. Mechanics at dealership changed solonoid. Suggesting replacing turbo next. What about catalytic converter or MAF sensor?
Welcome to JA! I am Carguy1 and I will assist you today.Hi there!Is the check engine light on?
Not right now. But it has been on and off since this problem began.
Well, the maf can cause a power issue or loss of power. The issue is that it really has to be checked with a scan tool. Seems the dealer would have at least looked at the readings to be sure if it was the problem or not.Also, many times the maf sensor will fail and not set a code. As long as the computer is seeing the inputs from the sensor, it won't turn on the light.This can cause the car to run poorly and never set a code.
Is there anything else at all I should make sure they check? Anything else in the differential diagnosis? And just to make certain I understand you're earlier answer- a scan tool will pick up an MAF problem even when the MAF sensor fails to set a code (which I assume IC checked by a computer and not this scan tool). Is that correct?
A scan tool with someone who knows what to look for in the parameters for the maf will pick it up. In other words, for example, I can look at the reading and see 4 volts, but know there should be 8 volts.The ecm in the car only uses the voltage to set the fuel mixture, so it's happy with 4 volts. It doesn't know 4 is wrong, it's just happy because it is seeing voltage.The only other thought I have would be the O2 sensors and that would be basically the same deal, you have to know what you are looking for and watch the live data.
Then lastly, do you think this can only be done at a Subaru Dealership?
Well no, any shop with a good scan tool can look at this. My only thing would be they have to know the specs they are looking for is all.
Then believe it or not I have ONE more question. WHERE CAN I GET THE SPECS TO MAKE SURE THAT THEY HAVE THE CORRECT ONES FOR THIS MAKE AND MODEL???
HERE is a link that should provide the info they need.Sorry for the delay.
Certified Subaru Technician, Factory Trained by Subaru
You're fantastic. Of course, while I was waiting I checked with my mechanic who swears he checked the MAF and the 02 sensors and that it is neither of those two things...oh well, I guess I'll take it to the dealership and hope they have some thoughts. Thank you for all your time.
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