What am I looking at?

I will admit, I am still learning my Snap on Solus edge, and I am trying to diagnose a rich condition on a 5.7 L 1998 Chevy.

Can any of you more advanced techs take a look at the following pics and tell me if/what looks out of normal to you?

I just replaced the ECT and AIT sensors. And wondered if anything looked odd to any of you?

The MAF might be a bit high. Is the AC on during this capture? I'd expect something closer to 6 or 7 g/s with that engine size, but accessory loads can change that.

ECT seems reasonable, but the IAT shows pretty darn hot. Still, I've never seen an IAT have that much influence on fuel control.

Is this rich at idle only, or under all conditons? A leaking spider assembly comes to mind.

I live in Phoenix, it was at idke, so that is why IAT is warm. It is using more during driving.

No AC was on at this time.

I did replace the stock injectors last year with the new design ones. I used aftermarket bc the Delco ones were twice as much.

I just noticed one if my cats rattling. Gonna remivevtge ceramics in them and add spark non foulers since I am in an "emissions" county.

Guess I'll have to have the ecm wiped and start the relearn all over and see if that improves the mileage issue.

Sent from my SM-G955U using Tapatalk

Remove the ceramics*

Sent from my SM-G955U using Tapatalk

8 grams per second on 5 liter engine at idle is high on the maf.... should be about 1 gram per sec for every liter

Computers probably trying to adjust a lean condition that doesnt exist by adding more fuel and actually creating a rich condition bc your maf readings are higher... gm uses a 5 volt pull down design on the yellow signal wire... see how many volts are on your signal wire... if its higher than 5 than your ground wire going to the maf might be bad

Thanks for the info. I'll check on that and let you know what I find!

Sent from my SM-G955U using Tapatalk