Silverado getting harder to start?

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  #1  
Old 09-08-18, 12:39 PM
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Silverado getting harder to start?

2000 Silverado, 4.8L, 2wd.

Lately it is taking longer for truck to start. What I mean is that I am having to hold the key turned & starter engaged longer for it to start. Worse when truck hasn't been just recently driven. No trouble with starter turning it over, just taking longer to get running.

Any suggestions?
 
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Old 09-08-18, 01:15 PM
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common problem would be a fuel pressure regulator leaking causing engine to flood would suggest you remove the vacuum line off of regulator if you do not see fuel, start to cycle the key on for a few seconds and off for a few seconds then repeat this will pressurize the fuel system typically they do not leak very much so you may have to cycle the key maybe up to10 times before you notice any fuel coming out witch would indicate a bad regulator.
 
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Old 09-09-18, 08:18 AM
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Hard start

Secondary ignition could cause extended crank worn plugs wires cap... .. .weak fuel pump.... Seen people spray carb spray first start of the day after that ok.... Have to check fuel pressure ... Need at least 50 psi
 
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Old 09-15-18, 07:08 AM
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Before I try this let me ask you a question. So am I understanding that if fuel is coming out when I cycle the key then the pressure regulator is bad? This being done when the vac. line is off correct?
Thanks a lot.
 
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Old 09-15-18, 11:52 AM
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That's the behavior I use to decide when to replace the battery if it's near the lifespan I expect out of it.
 
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Old 09-18-18, 06:49 AM
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"That's the behavior I use to decide when to replace the battery if it's near the lifespan I expect out of it. "
I would question the need to replace the battery if the cranking has not gotten sluggish even if it took cranking longer to get it to start.
 
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Old 09-18-18, 07:23 AM
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It's getting old, my 89 K-1500 is the same. From what I understand when cranking it has to reach so much oil pressure before it'll start the fuel pump or something like that.

When its been sitting a few days I might crank it the first time for, I don't know, 4-5 seconds before it starts. After that it'll start a bit faster.

I'll take my stopwatch next time and see.
 
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Old 09-18-18, 07:23 PM
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89 K-1500
350 V8
138k miles


COLD: 3.8 seconds to start (hasn't been started in 4 days)

WARM: 1.5 seconds to start (not running for 33 minutes)


Is your oil pressure maybe lower than before?


Love my old Family Truckster


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Old 09-19-18, 01:30 PM
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Alan73, did you see my post on the 15th? Just want to make sure I understand right. Not the battery, was replaced last year and is turning engine over fine. Although it is a 2000 Silverado, the engine was completely rebuilt about 2 1/2 yrs ago. Thanks
 
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Old 09-19-18, 01:58 PM
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Now that I know the battery is newer, I wouldn't be thinking it was the culprit either.
 
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Old 09-19-18, 05:50 PM
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Lately it is taking longer for truck to start.

Sure would be nice if you'd tell us how long "longer" is. ?????

10 seconds, 20 seconds, a week???????
 
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Old 09-20-18, 02:04 AM
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yes with the vacuum line off there shouldn't be any fuel coming out, there can be a lot of reasons for it to crank over longer though that is just one thing to check that was a fairly common issue with extended crank time and its pretty simple to check and replace if it was bad, if the regulator checks ok would probably check fuel pressure when the problem is occurring and see where its at.
 
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Old 09-20-18, 07:03 AM
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Thanks, I will check it out and see.
 
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Old 10-09-18, 03:18 AM
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Just want to say thanks. Due to family illness I just got around to working on my truck yesterday. You were dead on about the fuel pressure regulator. It was leaking like a sieve. Replaced and all is well. Much appreciate the help.
 
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