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Sputtering After High Speed

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Metacom

Member
Joined
Jul 10, 2022
Messages
30
Been noticing a sputtering issue recently. After driving on the highway or going ~60 MPH I notice the car sputters quite a bit. I have an LT1 MAF / translator and figured the MAF might be on its way out. Replaced it with a known good one and still having the sputtering issues but only after high speeds which is perplexing to me. When traveling on city streets, no issue whatsoever.

Other than the MAF / translator and a TT chip, the car is all stock with a new fuel pressure regulator and fuel pump within the last couple of years.

Can anyone point me in a direction with this? Quite puzzled it only happens after high speeds.
 
Fresh fuel filter? Injectors New? used and never been cleaned? If stock injectors as indicated you probably should look at an upgrade as 35 yr old injectors aren't exactly optimum.
 
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