Cars & Trucks Logo

Related Topics:

Paul young
Paul young Posted on Jan 11, 2009
Answered by a Fixya Expert

Trustworthy Expert Solutions

At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.

View Our Top Experts

Hard start after warm up

I have a 1998 GMC Sonoma with the 4 cylinder engine/auto transmission. It starts great when it`s cold but after it warms up and you shut it off and restart it again, it cranks for about 10 second or so before it fires up.It cranks fine but it seems like it `s not getting any gas for a while.After it fires it runs great.Right now it`s just a nousence but I`m afraid if I just let it go it will sooner or later let me down. What do you think? Any thoughts will be appreciated. Thanks for your time and patience! Paul

Answer This Question
  • Paul young Jan 12, 2009

    Thanks pierre,I did try pressing down on the throttle a little,but it started harder and seemed to load up(engine rpm`s built up slowly before taking off like it was flooding)I really didn`t pay any attention if it blew black smoke.I will try again soon to see what happens and let you know.I don`t drive it every day. I did put new plugs and wires on it and it didn`t help any.Think it could be the pressure regulater or fuel pump going bad?

×

3 Answers

Anonymous

Level 2:

An expert who has achieved level 2 by getting 100 points
MVP:

An expert that got 5 achievements.
Governor:

An expert whose answer got voted for 20 times.
Hot-Shot:

An expert who has answered 20 questions.

  • Expert 58 Answers
  • Posted on Jan 12, 2009
Anonymous
Expert
Level 2:

An expert who has achieved level 2 by getting 100 points
MVP:

An expert that got 5 achievements.
Governor:

An expert whose answer got voted for 20 times.
Hot-Shot:

An expert who has answered 20 questions.

Joined: Jan 10, 2009
Answers
58
Questions
0
Helped
42158
Points
120

After you turn it off then wait till it gets cold to drive again!! Good luck.

Anonymous

Level 3:

An expert who has achieved level 3 by getting 1000 points
All-Star:

An expert that got 10 achievements.
MVP:

An expert that got 5 achievements.
Vice President:

An expert whose answer got voted for 100 times.

  • Master 962 Answers
  • Posted on Jan 11, 2009
Anonymous
Master
Level 3:

An expert who has achieved level 3 by getting 1000 points
All-Star:

An expert that got 10 achievements.
MVP:

An expert that got 5 achievements.
Vice President:

An expert whose answer got voted for 100 times.

Joined: Oct 26, 2008
Answers
962
Questions
1
Helped
478088
Points
2866

Check Fuel preassure. There is a video on youtube where you can learn how to do it. Also check for any vacuum leaks. Run the engine at 1200 rpms or so. Spray staring fluid over evrry vacuum hose you can find. Or gasket. Where the engine revs up . There is your leak. Repair leak.

Ad

Pierre Laplante

Level 3:

An expert who has achieved level 3 by getting 1000 points
Superstar:

An expert that got 20 achievements.
All-Star:

An expert that got 10 achievements.
MVP:

An expert that got 5 achievements.

  • Chevrolet Master 2,061 Answers
  • Posted on Jan 11, 2009
Pierre Laplante
Chevrolet Master
Level 3:

An expert who has achieved level 3 by getting 1000 points
Superstar:

An expert that got 20 achievements.
All-Star:

An expert that got 10 achievements.
MVP:

An expert that got 5 achievements.

Joined: Jan 02, 2008
Answers
2061
Questions
3
Helped
788824
Points
21147

When its hot hold the gas pedal just a bit to see if it start better maybe its our idle air control try that let me know pierre

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

0helpful
1answer

Won't start when engine is cold,
Have someone check your fuel pressure regulator, hard cold start can sometimes be caused by that.
Read full answer
Jan 17, 2014 • GMC Cars & Trucks
0helpful
1answer

1998 gmc hard to start
Is the base fuel pressure the same hot when it is cold, and so is the spark weak when the engine is hot ?
Read full answer
Jun 05, 2013 • 1998 GMC Sierra
0helpful
1answer

Will not idle when cold
Its cold start issues:----
Go through the list of help links mentioned below:----

Click the link :----

Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html
----------
Low idle when cold out side?
http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html
--------------
Ford explorer 4.0 will not idle when cold?
http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html
--------
Automatic transmission shift lever hard to move on cold mornings?
http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html
----------
Car won't start when cold?
http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html
-----------

It can be issue with IAC( idle air control valve) causing the problem.


There are many other possibilities causing these idle issues. Engine idles rough.

There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

Ford Expedition IAC valve replacing

http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

-----------

Stumbling and stalling at idle after engine rebuild?

http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

------------

1999 Ford F-150 Idles rough and quits when gas pedal is pressed less?

http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

---------

Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

------------------

Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

-----------


Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

----------

Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

-----------

GMC Sonoma Stalls and idles low

http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

--------


GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-------------

1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

------------

Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

-----------

Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

---------

High Idle Problem

http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

-------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

--------

High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

-------

Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

----------

Rough idle, staling and Erratic shifting?

http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

-----------

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

---------

These details will help.

Thanks.

Read full answer
Dec 14, 2012 • 1999 Jeep Wrangler
0helpful
1answer

1997 GMC Sonoma with 4 cyl engine. The truck runs great, but after the engine warms up, the oil pressure drops to around 12 from 50 when cold. is this the oil pump and how do i change?
Depending on oil type (IE: synthetic, etc) this is normal. If using conventional oil then I'd be concerned. To replace oil pump you'll need to remove pan and it is bolted to lower part of engine.
Read full answer
Apr 03, 2011 • 1997 GMC Sonoma
0helpful
1answer

1998 gmc sonoma 2.2L when motor is warm it is hard to start-floods- start good when cold
Check the fuel pressure regulator. Pull the vac line after it is warm and see if it is leaking gas into the vac line.
Read full answer
Dec 28, 2010 • 1998 GMC Sonoma
0helpful
2answers

I have a 1998 gmc sonoma with a 4 cyl..engine...service engine soon light keep coming on...auto zone codes are reading radom misfire....the truck will run great...then for a about 10 sec...it will start to...
Check again for the codes, more than one fault code perhaps.
Read full answer
Apr 03, 2010 • 1998 GMC Sonoma
0helpful
1answer

1998 gmc sonoma air conditioner - not cold
Check the magnetic clutch is engaged on front of a/c pump, have the motor running, a/c on and fan on high, if the centre hub is static the pump in not switched on, this can happen when the gas pressure gets low.
Read full answer
Aug 05, 2009 • 1998 GMC Sonoma
2helpful
2answers

Location of iat high input sensor
The iat (intake air temperature) is located on the air filter housing. If its reading high its probably unplugged
Read full answer
May 17, 2009 • 2001 GMC Sonoma Extended Cab
1helpful
2answers

99 GMC sonoma will start with starting fluid then
Will the engine start on its own after the engine is warmed up?
Let me know.
Regards,
Read full answer
Mar 23, 2009 • 1998 GMC Sierra
0helpful
1answer

Missing when first started. Stops when warms up.
016 Engine Misfire Misfire Scan Data Find someone who knows what scan data is an knows how to use it .Intake manifold vacuum leak .
Rough Running When Cold GMC Yukon

Read full answer
Jun 19, 2017 • 1998 GMC Sonoma
Not finding what you are looking for?

View Most Popular

1987 S-10 Pickup

  • Cars & Trucks

Related Question

Won't start when engine is cold,

  • GMC Cars & Trucks

56 views

Ask a Question

Usually answered in minutes!

Popular Questions

Chevy S10 Tail Light issue

1993 Chevrolet S-10

How do i bypass the security on my chevrolet s10

1999 Chevrolet S-10 Pickup

Engine Code P1870

1998 Chevrolet S-10 Pickup

2001 Chevy s10 with no heat

2001 Chevrolet S-10

4.3 v6 connecting rods and main bearings torque specs

1994 Chevrolet S-10

Check Out the Latest Top Trucks Report!
Check Out the Latest Top Trucks Report!

View all Fixya Reports

Top Chevrolet Experts

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6988 Answers

john h

Level 3 Expert

29494 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...