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I have efi live for my 03 gmc diesel
How can I read a friends data on 98 k3500 7.4 .....thing starts fine runs great cold ..but when warms up runs like shit it's like it's missing won't idle ?
Any thoughts on that and how to read what the engine is doing ..I haven't used my scan tool in 8 years
Thx for any help
You can use either a FlashScan V1 or V2 to scan the 98 K3500, you may be able to tune it if you want as well (that controller is end of life for EFILive support however).
Fire up the Scan tool and connect to the vehicle, validate the PIDs, then really just look at the basics. ECT, RPM, Speed, Spark, LTFTs, STFTs. If it starts missing hard, you should see the RPMs drop.