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May 20, 2020 | 11:51 AM

Rodneywh1970

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Shuttering

I have a 97 7.3 when I let off the throttle the engine shutters real bad then smooths back out. If I let off easy it doesn't happen only when I let odd fast. Please help. Any ideas of what it could be. Check engine light comes on but it doesn't set a code.

Thanks, Rodney

May 20, 2020 | 12:40 PM

z31freakify

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Joined: Dec 2012

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From: Las Cruces New Mexico

Check your drive shaft Ujoints and center carrier bearing.

May 20, 2020 | 12:45 PM

Rodneywh1970

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It does it in park. Will idle for an hour and not do it but if I Rev it it shutters as the rpms drop.

May 20, 2020 | 12:48 PM

BuddyBarnes

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From: Fl.

If CEL comes on you probably have a code. You reader just can't read it unless the reader is for these trucks, like AE or forscan and others. Cheep walmart or parts house will not work.

May 20, 2020 | 12:52 PM

Rodneywh1970

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Well it's not a cheap scan tool. It's an autel 906bt. $2500.00 when I bought it two years ago.

May 20, 2020 | 12:53 PM

Rodneywh1970

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Check engine light goes out as soon as it smooths back out.

May 22, 2020 | 06:05 PM

tgbriggs16

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From: OK/OR/MI

Hi Rodney,

Mine did this when I got it about a year ago-- I'm assuming it's dropping to just above 500 RPM on the shudder? I had no codes but I'd check your engine valley (particularly your lift pump and the associated hoses) for fuel leakage. This ended up being my problem so I replaced them and the shudder is gone for good.