Hi Scotty I love your videos

I have a 2001 Mazda 626 I recently got the radiator repaired on the car after it was overheating. Ever since I got it back from the shop it has been having an intermittent idle issue. Where the idle will dip below 1000 rpms and on rare occasion die out. Also this does seem to happen more as the car has lower fuel amounts and seems to run differently as the car gets lower on gas. Like the fuel light comes on sooner. The other thing is over memorial day weekend I was driving my car down to San Diego and after about an hour of driving we were met with stop and go traffic. Suddenly after a few mins of that the car began sputtering/stuttering and would not accelerate after giving pressing on the accelerator. I pulled over to the side of the road as the car was still coasting and then after a few mins of hesitation the car began to go again. So I got back into the lane of traffic and after a few more mins the same thing happened with it stuttering/hesitating and not responding to depressing of the gas pedal. We pulled back over to the left shoulder and the idle dipped again and stalled out. The car started right back up but then stalled again almost immediately. I called triple A and they towed the car all the way back to LA. We were able to pull it off the truck and then park it with none of the above happening in the short drive. We asked the shop what they thought it was they said they drove it around for quite some time and could not get the problem to reoccur. I should mention the CEL has been on for 5 years and after getting it checked out several years ago they told me it was a slight leak in the exhaust that would not change the overall drive of the car. The current shop told us it was coming up with a catalytic converter code. Knowing this was quite an expensive repair and that the mechanic was only saying that was what the code was saying but not sure that was what was in fact causing the issue I went with my dad's advice to get two fairly easy things replaced to rule them out. The air and fuel filter replaced. The shop did it but after having the car back for a few hours the idle dipped after about 45 mins of being on and the car stalled out. I took it back and now oddly he hasn't insisted on it being the catalytic converter but is now saying they were able to get the problem to occur and it could be either the air flow valve (MAF I think) or the fuel pump. He is saying he is going to replace the air flow meter/valve and then see if the problem still occurs if so then he knows its the fuel pump. I am frustrated because I feel based on all the videos on here checking the fuel pump should be easier to diagnose then grasping at straws as well as the MAF. What are your thoughts (and I know I wrote a lot here)

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badbonz11
badbonz11

Thanks for the advice. i wish you lived closer to me or someone had a recommendation for a better mechanic. if you think of anything else it could be let me know. and if anyone else on here knows a good mechanic in the LA area I'm all ears. it's a mazda 626

ScottyKilmer
ScottyKilmer

Well, guy is more of a guesser than a mechanic. Cats can be pressure tested, as can MAF sensor data while road testing. Find a better mechanic, or let him guess with a maf and if it doesn't work, don't pay him. But really, find a better mechanic, one who will pressure test the fuel pump and other parts rather than guess.

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