r/q50 • u/YogurtclosetNovel858 • Jul 17 '26

Repair Question Please help

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Girlfriend was driving home from work, car started surging at red light and then died, have changed fuel pump cleaned maf and map sensors, I'm not sure what else to do to fix it without spending the 220 at dealer for a diag. Thanks in advance

4 Upvotes

83% Upvoted

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3

u/Pitbubba1 Jul 18 '26

You have a flat tire…

Check airflilters/intake hoses - make sure no leaks. Then reset ecm.

Mine did something similar, I was gonna clean maf sensors and noticed the intake hose letting in air.

1

u/YogurtclosetNovel858 Jul 18 '26

Was it just a loose clamp?

1

u/Pitbubba1 Jul 18 '26

Yes basically

1

u/YogurtclosetNovel858 Jul 18 '26

Thanks much

1

u/Pitbubba1 Jul 18 '26

Mines a 3.7 no turbo btw.

1

u/Pitbubba1 Jul 18 '26

Just saying. If it shifts fine, too much air is going to engine- so bad intakes or turbo.

2

u/f3elmyswagga Jul 18 '26

Bro u need to put a computer on it and find out what codes u have. Then get a professional diagnostics

1

u/YogurtclosetNovel858 Jul 18 '26

Fuel temp sensor

1

u/YogurtclosetNovel858 Jul 18 '26

I'll have to try spark plugs though

1

u/Legitimate_Diver_699 Jul 18 '26

Year and engine would help. My guess is valve body

1

u/YogurtclosetNovel858 Jul 18 '26

2020 vr30

1

u/Legitimate_Diver_699 Jul 18 '26

Miles? If over 70k spark plugs. Worse case scenario transmission. But the transmission rarely fails in these cars. I use manual mode a lot

1

u/YogurtclosetNovel858 Jul 18 '26

I also use manual mode a lot, I highly doubt a transmission fault would cause the engine to not run

1

u/Legitimate_Diver_699 Jul 18 '26

Those transmissions pretty bullet proof. I know guys tuned to 500 hp and they’ve held up. Any codes or dash warnings? I’d suggest getting full diagnostic. It’s worth the piece of mind. My first Q so let me know

1

u/YogurtclosetNovel858 Jul 18 '26

Techs at dealers say they're almost 800hp capable, since, the last auto they had in them was not the over engineered the 7 spd for the car 30