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Engine is hard to start?

Tiny
MACK644
  • MEMBER
  • 1995 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 312,000 MILES
Summer months truck starts fine but when it gets cooler out it's hard to start
Thursday, September 18th, 2008 AT 2:55 PM

32 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure fuel pump could be failing, also test the coolant temperature sensor/idle air control valve. These guides will help us fix it

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

and

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Please run down these guides and report back. I hope this will be of some help to you.
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Thursday, September 18th, 2008 AT 3:02 PM
Tiny
DEVOE7
  • MEMBER
  • 2 POSTS
  • 1995 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 149,000 MILES
I cannot start my blazer without starter fluid and even then it has poor pickup and stalls alot I have changed the in line gas filter and spark plugs and its the same please help runs good at higher speeds and I hear the fuel pump when I turn the key
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Thursday, September 10th, 2020 AT 12:46 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you hear the fuel pump when you turn key to run-if so check the fuel pressure if its within specs If not check fuel pump fuse and fuel pump relay
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Thursday, September 10th, 2020 AT 12:46 PM (Merged)
Tiny
DEVOE7
  • MEMBER
  • 2 POSTS
I dont think its the fuel pump because you can hear it on when you turn the key to the on position. Like I said I need starter fluid to start the car but then it runs fine idling once I put it in gear it hesitates untill I get it over 15 mph then it runs good especially on the highway and every time it goes back down to idle position, about 800rpm and I give it gas it wants to stall unless I play with the pedal. It cranks fine but wont start without a squirt of starter fluid. Someone told me it may be one of thesensors but I dont know HELP ME PLEASE
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Test the fuel pump and oil pump sending unit
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
PETERANDDONNA
  • MEMBER
  • 23 POSTS
  • 1995 CHEVROLET BLAZER
Engine Mechanical problem
1995 Chevy Blazer 6 cyl Four Wheel Drive Automatic 200.00 miles

trucks hard to start when it does got to keep on gas and black smoke out of tail pipe. The screw in egr valve pushes in and out freely any coments thanks peter
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Sounds like the vehicle is running extremely rich.

Does the black smoke or running problems go away after the vehicle has warmed up or stay all the time?

I would check out the fuel pressure first, get back to me and well see whats wrong.
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
PETERANDDONNA
  • MEMBER
  • 23 POSTS
Does not get any better after its warmed up the trucks got no power either seems to be bogging out thanks peter
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Would definetely be checking for fuel pressure, engine off and engien on. See if its getting too much fuel pressure or the injectors are using too much fuel.
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
ROGER007
  • MEMBER
  • 38 POSTS
  • 1995 CHEVROLET BLAZER
1995 Chevy Blazer 6 cyl Four Wheel Drive Automatic

i have a problem with my car if the engine is cold the engine hard starting and if the engine is hot the engine quick start. What is the problem of this matter?
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
MADMIKE1735
  • MECHANIC
  • 951 POSTS
Sounds like loss of fuel pressure. Most commonly caused by a bad fuel spider. (The main injector) these vehicles have 1 main fuel injector, and 6 injector tubes. 1 per cylinder. These tubes become brittle, and crack. Then leak. Easiest way to check, is remove your upper intake manifold. Then look for any wetness in your ports of the lower intake manifold. Let me know what you find.
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
59APACHECUSTOM
  • MEMBER
  • 1 POST
  • 1995 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
Its Hard to start but once it is started it used to start fine ater that. Now it is getting harder to start and keep starting after its been running
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi:
You need to check fuel pump pressure. Something tells me the pressure is dropping off when the key gets shut. The next time you need to start it, it takes a few seconds to rebuild the pressure.

Here is a how to for checking fuel pressure.

https://www.2carpros.com/dia/test_fuel_pressure.htm

What I need you to pay attention to is when the key is first turned off. I need to know how quickly the pressure drops back to 0 or below 10 PSI.

Let me know what you find and we'll go from there.

Joe
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
TROOPER2005
  • MEMBER
  • 3 POSTS
  • 1995 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 10,000 MILES
My blazer as one houndred thousand miles and as of late my chevy blazer has been hard starting if I give it a little gas while starting it chatches but idles rough at frist. I then woke up today and it started fine but now it idels rough and almost stalls so I then started to go to work and stoped at red light n it stalllled and the amp gage was moving down from 14 and back up can any one help me. Just had oil change and you can hear fuel pump turn one
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi trooper2005 and TY for the donation

Clean out the idle air control valve and test the coolant temperature sensor
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
TROOPER2005
  • MEMBER
  • 3 POSTS
Can you tell me were is it located at and I will try that and would that help the voltage as it is not a stady 14 it moves downslowly and back up
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What is the fuel system TBI or CPI vortec?
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
TROOPER2005
  • MEMBER
  • 3 POSTS
It is CPI vortec
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
STANDING WOLF
  • MEMBER
  • 2 POSTS
  • 1995 CHEVROLET BLAZER
Engine Performance problem
1995 Chevy Blazer 6 cyl Four Wheel Drive Automatic

car turns over but will not start, if I put starting flued in it, it will start up and run

what could this be

thank you Russ
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I'd check fuel pressure. You need a gage for that. If you have that spider fuel system, it is noted for problems. Hard start, no start after over night sit. The bulletins talk about the poppets sticking.

Once you get it started, does it run and drive ok? My info shows your obd1 so you might be able to check for codes yourself. That might point you in a different direction.

If it is the poppets sticking, you try some seafoam, see if it helps.
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Thursday, September 10th, 2020 AT 12:47 PM (Merged)

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