Question about 1998 Chevrolet Blazer

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Starts right up first thing in the morning then has trouble starting the rest of the day

Just replaced the fuel pump. First thing in the morning it will start and run great. After that first time if i start it again i have to pump the gas. And then it runs rough when idle. Driving is fine

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  • Contributor
  • 14 Answers

Replace the fuel filter and was your fuel pump from autozone if so there is your problem

Posted on Jan 17, 2013

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6ya6ya
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Posted on Jan 02, 2017

  • 141 Answers

SOURCE: died going down road twice the third time will not start

Fuel pump

Posted on Jan 11, 2009

  • 2920 Answers

SOURCE: 1989 350 runs rough for a while after ineling

have the converter checked it may be partially clogged

Posted on Jan 29, 2009

greg_margo
  • 1959 Answers

SOURCE: Rough idle and acceleration on 1998 Chevrolet Silverado 5.0

Bad EGR valve comes to mind here. Assuming the plugs are good, the EGR valve woiuld be what I'd look at.

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Posted on Jul 26, 2009

  • 11169 Answers

SOURCE: Shakes while idling and sometimes stalls.

check for minor vacuum leak and map sensor,pcv,egr valve

Posted on Oct 13, 2009

dj_relly999
  • 4070 Answers

SOURCE: I have a 2004 Avalanche 1500. I have had lots of

try replacing the cervo... it may be the cause of the constant tripping... its gonna be a big help for you

Posted on Feb 02, 2010

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1 Answer

My perguote 208year will not start until 34 turn over have to put foot on excelarater in mornings to start after that no probplem start right away till next morning same problem.


get ignition coil checked. If it is EFI DO NOT press on Accelerator when starting it.
Could have a leak in fuel and it evaporates over night
if carby fuel may be leaking out over night as vapour. In mornng you are fuel pump refilling fuel into carby until it starts again.

Mar 12, 2016 | Cars & Trucks

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Having problems starting 99 Chevy blazer have to chycle fuel after running starts right up already changed fuel pump


First thing in the morning, key on engine off, did you check proper fuel pressure before you changed anything? Do you have proper fuel pressure after changing the pump?


Cycling the key several times before you crank it, helps to pressurize the fuel system. Also, if you have the spider fuel system, that system is noted for problems. There maybe some service bulletin regarding cleaning the fuel poppet valves. Hard start in the morning, starts fine rest of day. The cleaning procedure I saw, was a shop procedure.

Nov 13, 2015 | Cars & Trucks

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Hard start cold, fine rest of day


I would be checking to see why there is power to the pump with the ignition off as this is a source to flat battery overnight.. May be a relay is still activated by a power source other than the ignition.

Jan 25, 2014 | 2000 Chevrolet Blazer

1 Answer

Hard to start in mornings


A common cause is a faulty check valve in the pump. The check valve prevents fuel pressure from draining back into the tank. The pump gets power from the relay for only 3 seconds during crank which would not be enough if the fuel line has zero pressure. You could cycle the key on and off a few times and probably start it quicker if that is the problem.
Have the fuel pressure checked after sitting overnight.

Jan 21, 2014 | 1998 Chevrolet Chevrolet silverado

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Car won't stay running after sits overnight and runs good after you do get it started


In the morning, turn key to on position for 5 seconds. Do not crank.Then turn off for 5 seconds. Repeat this about 5 times. Then try to start. If engine starts right up, the fuel pump check valve is bad. Meaning all fuel in fuel line is returning to the tank when car sits overnight. The only fix is to replace fuel pump. If that doesn't work, replace coolant temp. sensor for the computer. About a 12.00 part.

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1997 eclipse is hard to start the first thing in the morning, cranks but does not start. then it will sputter and finally it starts, no more issues the rest of the day


Check for loose wires or vacuum hoses which may have leaks or worn out.

You may want to check you battery. It should have at least 12.7v to get better starts. You may also want to try to jump start the car by connecting it to an idling car with a jumper cable. If it starts right away it may be a weak battery.

If the problem still persist it may be a weak starter since it is harder to start a car in the morning. Other than that it could be a weak fuel pump.

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'88 Ford Bronco II, 2.9L Hp fuel pump won't activate 1st thing in the morn. Have new fuel pump, fuel pump relay,ignition switch. I turn key on & off a few times...then pump activates. everything runs...


sounds like it could be the relay. also this one has 2 pumps I think, one in the tank LP and one on the rail just under the driver. 2 relays also one for each.

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