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I have a 2007 Chevy Suburban with 175,000 miles on it. I’m experiencing intermittent hard starting. After two or three tries it usually cranks up. There doesn’t seem to be a pattern to when this happens. It’s not always first thing in the morning, and it’s not right after I fill up with gas.
There seems to also be a related issue of an evap system leak code that gets thrown, and the hard starting and evap code seem to happen around the same times. I’ve replaced all the evap parts and the intermittent hard starting continues, and eventually the evap code gets thrown again.
I’ve thought it might be a fuel pump going bad, but would think if that was the case there would be some kind of pattern with the hard starting happening on a cold start after it’s been sitting all night or something. Have also wondered if a leaky fuel injector could be the issue. I did have one spark plug that was very fouled and causing a misfire. I changed it out, the misfires stopped, but the intermittent hard starting has continued.
Any ideas?
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I’ve experienced a similar issue with my 2006 Chevy Suburban, and it was quite frustrating. In my case, after numerous attempts, the car would eventually start, but the cause seemed elusive. I suspected the fuel pump initially, but the lack of a clear pattern made it puzzling. I also considered the possibility of a leaky fuel injector or an evap system problem, just like in your situation. It’s a challenging problem to diagnose, but your approach to checking various components is a good start.
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