Question about 2002 Chevrolet TrailBlazer

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The engine surges

The engine started surging when it was cold was last week today it does it all the time and stalls will not idle at all there is no ses light on.Also three weeks ago in two degree weather the battery died while driving it towed it to a gm dealer he put a new alternator on it slso did a diagnostics check and all came up all good.thanks geo

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  • Mike Butler
    Mike Butler May 11, 2010

    Seeing how your in a cold area. have you tried adding "Heet" or similar gasline antifreeze to fuel tank? Have you checked to see what voltage is at your battery when running?

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Well chuck ur out of luck buddddddddd


looks like ur going to be pushin the car all the way home tonite..lol

Posted on Feb 03, 2009

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2000 Suzuki Esteem 1.8L.. I went to start my motor & turned it off right before started. I heard some kind of backfire. Then I started it and it's been idling high, the surging. Please help!!


scan it yet, a FULL OBD2 scan? why not?if not.
now is the time...


the 1.8L J18 engine, same as the older Sidekick sports used.
same engine , know it I do.
its the precursor to the J20, (j18 is under-stroked, j20 with many of the same parts. inside)
the back fire means explosion sound to rear end of tail pipe?
yes, that is rich raw fuel in the muffler. plus Air.
if there are exhaust cracks and then engine goes rich this can happen( a double failure)
if how ever BACK means, back to the Air cleaner, then that be different reasons, (timing)


engine now starts.?>
engine runs.? has full power, car drives ok.?
JUST?
SURGE,. you never said.

does engine get hot? 180F or more and holds (y/n)
ever get a full tuneup this decade,
most dont so i tell you, bad spark causes, misfire and raw fuel is wasted to the exhaust and sure can go boom.

surging usually means the ISC can not control idle
so it hunts, (a suzuki software engine on all 90s engines)
PCM errors, inside it. (dangerous too)
a modern car, if idle goes too high the ecu commands the ISC closed
and holds it there solid, (safe way , no hunting allowed now)]
so if this car surges, it's , lean engine.

some think flooding is surging.
and this is usually below 800 rpm,
almost stalls, then corrects, seems like a surge.

next time post rpm range of surge.?????

do not drive a surging engine, do not be like Toyota drivers. (over 800 rpm hot)

surge from 400 -800 rpm is class 1 surge.
surge from 800 to say 2000 RPM is class2, and very dangerous to some folks, (key off, get car fixed, tow it)

The ECU controls idle speeds. (hard coded servo controls)

Mar 18, 2016 | Suzuki Cars & Trucks

1 Answer

Why does engine stall when I need to stop the car and put into the neutral?


idle control sensor might be able to be cleaned

could be a fault
or adjustment required to neutral safety switch

surprised there is no check engine light for fault codes

Mar 07, 2017 | Cars & Trucks

2 Answers

Ran it out of gas, now runs fine cold, as soon as its warm starts hard, and stalls when put in drive


Is the \'Service Engine Soon\' light on? Only from what you described, it sounds like the engine\'s running in \'open loop\' (fast idle, cold) okay, then when it\'s supposed to go into \'closed loop\', you have a malfunction. Checking the trouble codes will pinpoint the problem; your truck is pre-\'95 so it\'s the older OBD-I and you could get the trouble codes by grounding the proper terminal in the ALDL, counting the blinks of the SES light and using it to determine what electronic control device is malfunctioning. If no SES light/trouble codes and since you ran out of gas (?), it might be time to replace the fuel filter and possibly check the fuel pressure and/or fuel pump.

May 21, 2014 | 1990 Chevrolet K1500

1 Answer

When I start my odyssey it starts surging. I found a small rubber hose on the right side of the engine, but don't know where the other end of the hose goes....Help


WHAT COUNTY???????????????????????????????????
hot engine, cold or both?/// a key question
WHAT ENGINE: ( usa list , ONLY)
2.2 L F22B I4
2.2 L F22B6 I4
2.3 L F23A I4 2.3 L F23A7 I4
the fsm covers this. hose thing.... all hose can be followed,
unless its axle vents on 4wd cars. (they go no where, special)
is surging the only symtom.?
no engine stalls.?
lack of power in any gear or hills.
no misfiring?
no flooding.?
starts easy/?

ok what is surge, that it really is idle controls bad or out of comtrol
1: idle controls bad. (isc dead?)
2: or engine is running way too lean, and ISC cant keep a grip on idle.

easy huh?
and #3 misfiring so bad the idle controls fail.
are all fuses good?
is the CEL lamp glowing , then goes out running engine.
no , the scan it. or do the flash DTC codes trick.

a good tech ,first finds out if the engine holds closed loop status
hot. at idle, if not, he fixes that first.
as he/she knows that idle is the last thing to work right, in EFI.

one other way to get surge is air leaks (aka. vacuum leaks)
if the engine (unsaid option) is MAP based, it will race fast
with any vacuum leak, and it dont take much of a leak
to make the ISC idle controller go nuts.

so repost , hot/cold both questions
and actual RPM numbers. we need numbers
is the dash Tachometer missing. ????
and what engines in car.

all lean engines surge.
all ISC systems can surge if out of control , not all do this. just 1/2
if the ISC surges, it means its trying hard to gain back control.
this is called a software servo loop.
The ECU is programmed to hold rpm near say 800 RPM hot.
and is very digressive in that role.
I have a 91 car that will surge, with any vacuum leaks.
(by design) depends on which engine.

Feb 15, 2014 | 1995 Honda Odyssey

1 Answer

Increase then decrease idle when engine is cold especially


cold engine idle surge. (problem)
RPM range of surge not stated
300-700 or 800 to 1500? (range is critical to diagnosis)

bad fuel
running summer fuel in winter (running old fuel?)
needs a tune up bad, see the list in the operator guide.
idle speed controller,sticking or EGR valve same. (clean them)
location not stated, so cant guess about local air temps.?
no other symptoms, lack of engine power? etc?
was it ok last week, or better, when was the last time it was OK?
1week, 1year?
surge , causes, on a tuned engine might be:
1: too lean. so lean the ISC can not control idle. rpm low, stalling
2: too rich, flooding, stalling, spark plugs foul (look at them)
3: weak compression in 1 or more cylinders.
4: bad spark.
5: air leaks, in the plenum causing , ISC to lose control.
why high RPM?

especially?
well that means it fails hot too.
and there is a simple tests. for hot surge.
is engine fully hot? 180F and holds solid there?
say rpm is about 800
and you turn on head lights, heater fan and (not AC) and defrost.
the RPM must hold or the ISC is failing.
ISC -= idle speed controls. (all EFI has this function)

Oct 28, 2013 | 1996 Honda Prelude

1 Answer

2000 ford taurus ses surges when engine is warm and stalls frequently


I would take it by any auto parts store to have them pull codes from the computer. They should be able to tell you the problem. However, I would suspect the IAC (idle air controller) to be faulty.

Dec 23, 2012 | Cars & Trucks

1 Answer

Why is my Grand Prix surging/stalling when ideling?


If you did not disconnect the battery and drain the voltage from the ECM, it could be using old settings when the problem existed.
When a problem occurs, the computer tries to correct it or find new settings to work around the problem. When you fix a problem you have to clear the codes and sometimes erase the memory from the computer to allow it to start back at the factory settings.
When you disconnect something and the check engine light comes on, the computer goes into limp mode and uses values for the sensors preset by the factory. The car will almost always run rich to ensure the driver can get back to a place for repairs.

Aug 23, 2012 | 2000 Pontiac Grand Prix

1 Answer

I have a 19999 Mazda B2500. The idle is very rough and when you step on the gas pedal the engine surges between idle and about 1500 RPM. It can best be described as acting much the same as the governo


it sounds like a lambda sensor issue, the lambda sensor is located on the exhaust manifold, it controls the emisions, it also controls the air/fuel mixture to control the emisions, if it is faulty it could cause the engine to surge like you describe

Aug 02, 2012 | Mazda Cars & Trucks

2 Answers

Why does my car idle up and down


This is called idle surge, do the following to correct it 90% of the time. Read the many symptoms and then do the procedure exactly as outlined by nme in the article I wrote about this.

Here are the common cause of idle surge, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours.

To correct this problem I want you to get a can of intake cleaner (ABOUT $5.00) from any local auto parts store like NAPA or Carquest, do not use carburetor spray, intake cleaner only or u will damage the Teflon coating inside the throttle valve and air bypass valve, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won

Dec 29, 2010 | Ford Explorer Cars & Trucks

1 Answer

At idle engine surge's up and down usually a few hundred RPM's


DS THIS PROCEDURE
Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

May 04, 2009 | 1998 Honda Civic

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