Question about 2004 GMC Envoy

Open Question

Map sensor code engine surge when cold 2004 gmc envoy 4.2

Map sensor code came up and was fixed now engine surges at idle

Posted by Anonymous on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 74 Answers

SOURCE: MAP SENSOR 93 GMC SIERRA 1500 2wd

youare dealing with a spark plug or sparkplug wire thats breaking down causeing a mist thats what your surge is i ypuld change both

Posted on Jul 07, 2008

Ad
  • 91 Answers

SOURCE: 2004 GMC Envoy has trouble idling

Try the fuel filter. Sounds like the engine might be running rough due to weak fuel pressure. Its cheaper to replace, especially if it's still original from 04. Try running some injector cleaner through a couple of tanks of high octane gas.

Posted on Aug 06, 2008

  • 14 Answers

SOURCE: 1992 gmc chevy 350 wont idle when warm

This could be a number of things but i think that your problem sounds like a vacuum leak or an EGR problem. Try listening for leaks and try un-plugging the EGR solenoid valve one time.

Posted on Apr 17, 2009

  • 303 Answers

SOURCE: 2004 GMC Envoy check engine light remains

Leave 02 sensor alone ,it is doing it's job . It is heated up because of lean fuel mixture due to incorrect engine temp.,replace thermostat before looking further.

Posted on Jan 20, 2010

  • 1311 Answers

SOURCE: 2004 GMC Envoy with a P0526 sensor problem

This code indicates a problem with the fan clutch, the speed it is running is not the speed it was commanded to run/ The fan clutch assembly needs replacing.

Posted on Sep 09, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

2005 doge diesel idle surge


Things to try, replace fuel filters, get a can of MAP sensor cleaner and clean your map sensor. Check to see if there are any codes. Get a good fuel injector cleaner and run that through. If its cold, put some good additive in that has a fuel deicer.

Dec 08, 2014 | Cars & Trucks

1 Answer

My 2004 gmc envoy reading said running to lean


engine code,fuel pressure,bad fuel,o2 sensor, map sensor, coolant sensor and so on
with scanner look read data to see data out of range . code will set only for short to ground or open circuit

hope it helps

Oct 13, 2014 | 2004 GMC Envoy

1 Answer

OBD code po108. RPMs erratic and engine surging at idle


code po108 refers to manifold absolute pressure ( MAP) sensor/ barometric pressure (BARO) sensor---high input====causes--wiring short to positive---MAP sensor---BARO sensor---ECM
Check the MAP sensor first and replace if necessary

Feb 14, 2014 | Chrysler Cars & Trucks

1 Answer

97 toyota surges at an idle


(which engine. ?????)_
as always check all fuses. and scan the ECU for DTCs. first.
there is no need to fix OBD2 cars like 1980 cars (hard rows to hoe)
it can be 2 problems this......
lets fix the easy one first. idle. (and hope for moving issues to fix for free) it idle car is parked, so is 100% safe tests. (not moving)

so it surges at idle.
questions.?
1: hot or cold or both.?
2: low extreme RPM and high at idle.

400 to 800 RPM? surge.
1000 to 2000. what? numbers tell the tale.

first off, idle is the last thing to work right on any engine.

there are many ways to find what is wrong.
fix idle surge way.
i make sure that the engine holds closed LOOP status.
hot idle, if not , i fix that first.
keep in mind if not in closes loop and lean
all lean engine surge and guess what the ISC will add to the surge
because idle is way too slow, so the ECU open the ISC wider
and wider and its still too slow, so the ECU resets the ISC
this cause a worst hunt (surge)
the ECU adjust spark time and the ISC to get 800 rpm. (spec. look up yours)
so say , i see closed loop failed, OBD2 scan page 1
i look at the O2 sensor an its stuck lean.
if stuck lean and it really is (o2 bad?) then its lean and it will surge
.
examples.
1: i find 02 sensor bad, (only effects idle and light steady cruise)
2: i find fuel pressure at 15PSI , hopeless low .
3: i find all injectors clogged. and lean.
4: with MAF EFI, ( i find maf reading too low, (dirty) causing lean.
5: if MAP car, i find the MAP stuck hard high vacuum causing lean.
not knowing what engine you have or the idle hot surge range,
i can not go farther.

the driving bog tells me,
1: scan the ecu ,get DTCs; do that first.
2: clean MAF if car has one, ask how..
3: check fuel pressure.


my guess is engine is lean. and starving for fuel all the time.
cept WOT.

MAF cars starve for fuel if there are any vacuum leaks.
MAP cars do opposite, they race fast with 100% full power.
MAF is air density EFI
MAP is speed density EFI.
apples and oranges diffr. so what engine.


Jan 07, 2014 | 1997 Toyota Tacoma

1 Answer

When I start my car up cold there is a surging up


Check the EGR system or for any vacuum leaks

Oct 26, 2013 | 2004 Pontiac Grand Prix

1 Answer

I HAVE A 1988 GMC 5.7 V8 PU...IDLES UP & DOWN WHEN COLD...SURGES...NO POWER COLD...RUNS GOOD AFTER IT WARMS UP...NO CHECK ENGINE LIGHT...TIMING CHECKS OK...PARTS ALREADY CHANGED:...COIL-PLUGS-PLUG...


Remove the vacuum lines on the bottom front of the throttle body with the engine off. Check each hose connection with a nail; small screwdriver or a small drill bit. Make sure they are not clogged. If they are clean them out carefully. If they are not clogged, then check to make sure the vacuum lines aren't obstructed. I refer to your idling up and down as hunting. Reconnect the vacuum lines and start the engine. If it idles smoothly, your found your problem. Good luck.

Sep 13, 2011 | GMC C1500 Cars & Trucks

1 Answer

I have a 2004 gmc envoy my car has been surging like cutting out.We hooked computer up 2 it n it read map sensor i replaced it but still doing same thing what could it be now if i replaced the part it...


The fault codes don't always indicate the actual part failure, but the general area of a possible problem. The first thing to do with a problem like this is to clean the throttle body. Make sure to disconnect the battery when doing this procedure because it will cause the computer to reset and relearn with a clean throttle body.

Jan 30, 2011 | 2004 GMC Envoy

1 Answer

1994 gmc sierra surges and hesitate when i


have him check the catalytic converter it sounds like it is glogged

Oct 15, 2009 | GMC C1500 Cars & Trucks

Not finding what you are looking for?
2004 GMC Envoy Logo

Related Topics:

22 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76649 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

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

Answer questions

Manuals & User Guides

Loading...