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post #11 of 19 (permalink) Old 03-08-2019, 10:21 AM Thread Starter
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Car runs almost 100% better, almost perfect idle now. For anyone that want to know, i cleaned the throttle body in a ultrasonic cleaner with electronic upwards not touching the water. I used water + ultrasonic cleaner and soap.

I filled up with 98 octane (usually i used 95 octane before). I noticed that the car stalled in the highway one time, as if it got choked but automaticly started back up again.

Could the fuelfilter be clogged and the ECU notices preaussure loss and forces more fuel to engine and makes the car go rich?
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post #12 of 19 (permalink) Old 03-08-2019, 11:25 AM
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Originally Posted by Alexxelax View Post
Car runs almost 100% better, almost perfect idle now. For anyone that want to know, i cleaned the throttle body in a ultrasonic cleaner with electronic upwards not touching the water. I used water + ultrasonic cleaner and soap.

I filled up with 98 octane (usually i used 95 octane before). I noticed that the car stalled in the highway one time, as if it got choked but automaticly started back up again.

Could the fuelfilter be clogged and the ECU notices preaussure loss and forces more fuel to engine and makes the car go rich?
With how much garbage you had everywhere else, it's worth checking at least. that, or the ECU is used to having everything clogged up and needs to re-learn what it's like to be properly maintained lol.

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post #13 of 19 (permalink) Old 03-11-2019, 04:13 PM Thread Starter
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It seems that the car has its fuel filter inside the gastank with the fuelpump so i will jump that step for now.

I took off the intake manifold and surprisingly it was very clean and inte intake valve chambers, the valves are very very clean, no buildup at all. That is little wierd i think. Also the PCVhose was in good shape no cracks, the PCV valve, injectors (i think i will replace them any way with partnumber 0280156154 hope they will fit) and the fuel rail ( fuel rail when blowing in it it felt clogged) in the ultrasonic cleaner.

I have cleaned the intake manifold and setting it to dry.

Next step will be engine temp sensor, CPS, o2 sensor, catalytic converter, sparks and coils.

Do anyone know if Mazda 3 o2 sensor will fit mazda 6 (same engine, but the sensors have diffrent partsnumber, i belive it has to do with the lenght of cable but not sure) so if anyone had tried and could tell me would be nice
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post #14 of 19 (permalink) Old 03-12-2019, 08:00 AM
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I have not tried, but I would assume the same as you - the numbers differ so something physical is likely to differ as well.

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post #15 of 19 (permalink) Old 03-15-2019, 05:50 PM Thread Starter
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I have not tried, but I would assume the same as you - the numbers differ so something physical is likely to differ as well.
I found a Mazda 3 2.0 in a scrapyard, the o2 sensor had only 4 wires, 2 grey 2 white if i remember right, but my mazda 6 has 5 wires, think it was 2 white, 1 grey, 1 black and 1 blue and 2 connectors. So it seems to be more complicated o2 sensors on the mazda 6.
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post #16 of 19 (permalink) Old 03-15-2019, 06:28 PM Thread Starter
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After removing the intake manifold for cleaning, the car now hesistates when accelerating wich made me think of 3 scenarios,

1. I damaged the throttle body (have read that not move the plate by hand wich i did)
2. Ignition problem, spark plug or coil but here i think missfiring would be more reasonable.
3. Vacuum problem - Hose that i have forgot to connect or something, but more likley the canister valve hoses that are wrong put. If anyone have a picture that could guide me on how to connect the hoses i would be very thankful.
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post #17 of 19 (permalink) Old 03-15-2019, 08:15 PM
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Originally Posted by Alexxelax View Post
After removing the intake manifold for cleaning, the car now hesistates when accelerating wich made me think of 3 scenarios,

1. I damaged the throttle body (have read that not move the plate by hand wich i did)
2. Ignition problem, spark plug or coil but here i think missfiring would be more reasonable.
3. Vacuum problem - Hose that i have forgot to connect or something, but more likley the canister valve hoses that are wrong put. If anyone have a picture that could guide me on how to connect the hoses i would be very thankful.
@DrFeelGood, I've observed that you always have a picture or reference for something like this.

Last edited by Archerfish; 03-15-2019 at 08:18 PM.
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post #18 of 19 (permalink) Old 03-15-2019, 09:21 PM
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Vacuum hose routing diagram

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@DrFeelGood, I've observed that you always have a picture or reference for something like this.
The Dr. is here for you.
I can't remember what vehicle specifics you have (perhaps making a signature with the info would help) but I am going to assume you are v6.
With a hesitation I would bet you dislodged one of the connectors on the coils. If I know anything about how these things work I bet it is one of the ones on the rear bank.


As far as the TB is concerned, I have moved that thing countless times without issues so I am skeptical about that.
Good luck mate.


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post #19 of 19 (permalink) Old 03-16-2019, 06:50 PM Thread Starter
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Thanks both Archerfish and DrFeelGood.

Unfortunatly i have a 2.0 petrol engine. I tried to move the hoses and noticed that there were alot of preassure in one hose so that was wrong fitted, the car didnt hesistate as much but it started to after a wile, this problem was not there before removing the intake manifold so i am sure it is some faulty connections.
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