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97 malibu hard to start when cold outside, fuel pressure good,fuel injecters good, what is the problem

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  • 7 Answers

Try running sea foam to clean injectors. put it in your gas

Posted on Jan 17, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: my 98 mustang wants to start hard

what do you mean start hard?
you mean slow cranking or long cranking before start?

Posted on Jul 19, 2008

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SOURCE: 1998 Chevy tahoe Hard to start when cold

Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Posted on Jan 03, 2009

  • 74 Answers

SOURCE: 1998 Chevy tahoe Hard to start when cold

replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Posted on Feb 17, 2009

csmock132
  • 4669 Answers

SOURCE: 85 xj6 4.2lt. fuel injected, (Problem will not

Does it even try. (cough and sput) Will it start if you spray carb cleaner in it?

Posted on Mar 12, 2009

cadman000
  • 607 Answers

SOURCE: 2003 chevy malibu wont start

If you have spark, and fuel , and still no start, I'd first pull out the spark plugs and make sure they are not fuel fouled. Dry or replace as necessary. Do you have compression ?

Posted on Apr 11, 2009

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Have 97 yukon on hot days going uphill then stoping for awhile it wont start but let set for awhile it will start is this vapor lock and what can i do


Most fuel injected vehicles no longer experience vapor lock, since fuel circulates continuously thru the fuel rail and back to the tank. More likely, you have an electrical part which gets hot once you shut the truck off. You need to test for spark to the plugs, and also correct fuel pressure when it fails to start and see which is lacking.

Jun 19, 2015 | 1997 GMC Yukon

1 Answer

97 7.3 diesel hard starting


This is a good engine but they need work from time to time. What is the outside temperature while you experience this hard start? If you plug in the block heater, does the engine start better? Is the engine light on or does it come on at times while you are driving? Hard starts can be related to several different issues. This engine isn't easy to work on unless you have an advanced scan-tool. You need to look at live data and run some tests. The more common failures are clogged fuel and air filter. Dirty ,worn, or defective fuel injectors, low fuel-line fuel pressure, poor oil quality or low oil level, worn or defective ICP sensor, low injection pump pressure, loose or leaking IPR valve, or low compression. These examples should help get you started. You may need to have the truck diagnosed so you know what direction to go in. If you need any additional information, please write back. Good luck.

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99 land rover discovery hard starting when cold


Your Land Rover is no doubt fuel injected.maybe cold start injector. injects gasoline when starting in the cold, carburated vehicles used to have a choke to enrich air/fuel ratio when starting in cold.

Nov 30, 2013 | 1999 Land Rover Discovery

1 Answer

1999 Malibu hard start in hot weather, after it starts runs great lots of power. starts when cold in cooler weather.V6 3.1 engine. have gas at rail. changed spark plugs and wires, IAT and ECT sensors also...


this is most likely a fuel vapor issue.

fuel boils in the fuel rail causing a hard start after a 'hot soak'.

the fix is to replace the fuel pressure regulator and the pcm. good- day !!

Jun 30, 2011 | 1999 Chevrolet Malibu

1 Answer

Got a 1999 gmc jimmy. Wether it is cold outside or warm my truck has difficulty starting when the truck is cold. Got new plugs wires and distributor. Fuel pump is working fine. Once it is running there is...


Common problem with these is a fuel drainback. Use a fuel pump pressure tester, start the engine, If it's multi-port fuel injection the psi should be 50psi+. If 50psi, turn off engine and notice psi drop. If fuel pressure drops off to 10 or 5 psi, try to start engine and watch for a jump in fuel pump pressure. If pressure jumps to 50psi and the engine won't start, then I would suspect a good working fuel pump, if not a jump to 50 psi, I would say bad fuel pump. Good luck, Gary

Jul 22, 2010 | Cars & Trucks

4 Answers

1997 gmc sierra pu.5.7L won't start in cooler weather when left outside or sits idle for a couple of days. The fuel pressure reg. has been changed with no apparent change. If I warm-up the fuel lines near...


you need to have the engine coolant switch checked,since the computer relies solely on sensors,the ect tells the computer how cold or hot it is so the computer will make it a rich or lean mixture to start the engine,if it tells the computer that it is 75 degrees the computer will lean the mixture like starting a car in the winter without a choke.

Jan 03, 2010 | 1997 GMC Sierra

1 Answer

Hello, I have a 97 blazer and had replaced the fuel pump about 3 weeks ago. while i was driving last week the truck just died, with no hesitation or warning. now when i go to start she just cranks and...


try checking the fuel injection module out, ( "spider injection module"). My 2000 blazer did the same thing, fouled out the plugs and all, i hooked the fuel pressure gauge up and had good fuel pressure, just no start. I took it to the shop and they found the injection module to be the culprit. you'll need to replace the plugs if it was the problem since you cranked and cranked it over.

Jul 06, 2009 | Chevrolet Blazer Cars & Trucks

3 Answers

1998 Chevy tahoe Hard to start when cold


replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Feb 17, 2009 | 1999 Chevrolet C/K 2500

1 Answer

1998 Chevy tahoe Hard to start when cold


Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Jan 03, 2009 | 1998 Chevrolet Tahoe

1 Answer

Hard to start when engine is cold


The thing you need to do is run a leak down test on the fuel pump overnight, hook up a fuel pump test guage to the fuel injector gas rail test port, run the engine, note the fuel pressure when you shut the engine off, it should not drop more than 5 PSI overnight, if it does you need a new fuel pump. Your car doesn't use a cold start valve, that was used on very early Bosch K-Jetronic fuel injection systems, they where last used in the 80's

Oct 28, 2008 | 1990 Mitsubishi Galant

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