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25/06/2022 8:02 am
Topic starter
Scotty,
I have a 2006 Hummer H3 with 230000 miles on it. Engine was replaced at 160k miles and the automatic trans was replaced at 220k. Recently the engine has had a hard time starting up. It coughs and chokes then dies. Sometimes it take 5-10 attempts to start. Once it’s running it is fine. What could be the problem? Also the speedometer consistently reads 20mph low. 20=40mph 40=60mph. The H3 has 35” tires but that doesn’t account for the speed difference.
1 Answer
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25/06/2022 8:35 am
Get it scanned for codes. It could be something as simple as malfunctioning fuel injectors. Check the fuel pressure. When was the fuel filter last changed?
