Question about Chevrolet C1500

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My 1991 chevy c1500 2wd 4.3l is very hard to start when cold but does not have a problem when temp reaches 190

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Low fuel pressure could be from weak fuel pump or fuel pressure regulator.

Posted on May 09, 2010

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1991 chevy lumina wont start after sitting when you drive it


Just because you replaced the fuel pressure regulator does not mean it is working correctly; which is the most common cause of your problem. Hook up a fuel pressure guage and watch what happens when you are starting it cold - it should go up to about 47 PSI and once started it should read between 40-47 PSI, then when you turn the engine off: Does the pressure drop? There is a check valve built into the fuel pump also; that can be faulty and if the pressure is generally reading low and the check valve is bad- this can also create your problem. We have run into this before also; When the fuel pump is cold the internal pump seals are sealing great, but after a period of running time the pump seals lose sealing power and if you try to start it again it will be hard to start. The biggest thing with this situation is getting the fuel pressure readings at the following points of time:: Start-up, running cold, running at normal operating temp, engine off, engine re-start.
Pete/ Bambenek Auto LLC

Apr 15, 2014 | 1991 Chevrolet Lumina

1 Answer

05 c200 cdi preglow light goes off then soon as start driving comes back on for a couple of minutes then goes off


The ''glow plugs'' preheat for starting but also cycle off and on on a cold engine to help with more complete combustion before the engine reaches a certain temp. This usually takes more more often during winter but is norrnal if it goes off after a while.

Aug 30, 2010 | 1985 Mercedes-Benz 190

1 Answer

Chevy Suburban 1997 1500 won't start when Cold


it could be a tune up issue such as plug wires plugs . but my guess is its a computer engine temp sensor if it reads 5 degrees out of range it cuold give you a hard start or a no start problems the best way to look at this problem is with a scan tool when it is cold to see if the temp matches outside ambeint air temp 1 or 2 degrees ok b ut not 4 to five there is a nother way to check it buy useing dvom at a temp to omhs chart.

Jan 11, 2010 | 1997 Chevrolet Suburban

1 Answer

My 1991 chevy k1500 runs fine when cold but when it warms up it cuts out when you gas it.


hi, the problem you are having sounds to me like the oxygen sensor " or lambda sensor for its real name" has failed and needs replacing the reason it points towards this being the fault is that the oxygen sensor only starts working once the engine reaches a certain temp so if your car runs perfect from cold but plays up when warm then this is a good indication that the oxygen sensor needs replacing.

Let me know how you get on or if you need further assistance ok

Dec 28, 2009 | 1991 Chevrolet Silverado 2500

1 Answer

Hard to start when cold. cannot touch the gas pedal. it will eventually start. when it warms up a little it runs fine.


hi your car is 18 years old has the ht leads ever been changed this is worth having a look at the leads crack after a while and let in the damp also when they are dry spray with damp start hope this helps

Nov 15, 2009 | 1991 Mercedes-Benz 190

2 Answers

1992 190e mercedes starts very hard


Check electronic temp censor take censor and boil water with a multi meter put it on continuity rage and test lead on censor continuity sould incrise as you dip min water is not the chage censor

Jun 09, 2009 | 1991 Mercedes-Benz 190

1 Answer

2001 vlove s-40, After turnig the key off the cooling fan stays running for 8-10 minute, even when cold.... ????


thats normal . if the coolent temp reachs 210 the fans come on and run intell the coolent temp drops to 190

Jun 03, 2009 | 2002 Volvo S60

1 Answer

1997 chevy astro van has poor starting problems after it sits all


hello ralph...check the coolant temp sensor. It acts as a choke to richen fuel mixture when cold. If it doesn't work correctly, hard starting will occur. Once engine reaches operating temp, the problem is usually non-existent. also....
Worn spark plugs.
Fouled spark plugs.
Worn distributor cap and rotor.
Old ignition wires.
Low engine coolant level.
Faulty MAP sensor...any of these will effect cold starting....

Good luck...i hope this helps.

May 17, 2009 | 1997 Chevrolet Astro

1 Answer

2000 chevy blazer starting issues


swng,
1) Is the service engine soon light ever on when engine is running?
2) Per your description I would look at the ECT sending unit. It sends coolant temperature information the the Engine Control Module for proper fuel delivery for cold engine start. It may have lost its calibration.
Let me know.
Regards,

Feb 24, 2009 | 2001 Chevrolet Blazer

1 Answer

Hard engine starting in normal working temprature benz 300Etype


check to see if it has a map senser im not positive about mercedes but it sound's to me it's eather map or start valve hope this is helpful

Jan 20, 2009 | 1993 Mercedes-Benz 190

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