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Question

Blazer hard starting in the morning


Sent to Car Experts August 13, 2005 9:20 p.m.
Why does my 93 blazer 4.3 not want to start in the mornig but afteri get it going it is fine allday
Customer (name blocked for privacy)
Status: Closed   Value: $5   
Answer
August 13, 2005 9:24 p.m. (4 minutes and 51 seconds later) 		ACCEPTED Check Mark
You could have a temp sensor that's reading incorrectly but more likely it would be a fuel pump with a bad check valve in it. It will not hold rest pressure and will siphon the fuel back into the tank overnight. To diagnose this, you will need a fuel pressure aguge and see if it holds pressure when the engine is shut off. If it's not holding, immediatly pinch off the feed line and see if that makes it hold. That would indicate a bad pump.
PictureHammer Time  -- L1 Master Technician -- 98% Positive Feedback on 2707 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Answer
August 13, 2005 9:30 p.m. (5 minutes and 57 seconds later)
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Chris  -- Machinist -- 100% Positive Feedback on 28 Car Accepts
6 prior ASE cert., 7yrs in Army as Mechanic, w/22 yrs experience

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