Question about 1999 Mazda Protege

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Engine surges - 1999 Mazda Protege

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Could be the idle air control or the map sensor but before you go spend alot of money on parts i would really recommend taking it to a automotive shop because as much a crook the automotive industry is with these foreign cars it could cost twice as much in parts ----i did it and still ended up taking it to the shop and it was a small part that i would have never guessed. in the end i spent 1200.00 on parts that i didnt need and 250.00 at a shop and never had trouble with the car again

Posted on Dec 06, 2008

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I got the problem fixed. Re-tightened the intake manifold and the fuel line to the injectors

Posted on Jul 25, 2008

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My 2010 jeep patriot with a 2.4 is surging when u accelerate from a stop.


Could be any one of a number of sensors for engine control . Mass air flow sensor , TPS - throttle position sensor, or APP- accerator pedal position sensor etc... Without testing an looking at scan tool data ,who could say for sure . How does the vehicle idle ? how does the vehicle run at cruise speeds ? Does the vehicle have electronic throttle control ? 2010 - i'm sure it probably does . Is the check engine light lit ? Your best bet would be to take it to a qualified repair shop.

May 31, 2016 | 2010 Jeep Patriot 2.4

1 Answer

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

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

Troubleshooting a 1992 buick skylark engine surges


If it is surging up and down, then i would say that it is a bad oxygen sensor, or a leaking intake gasket. Hope this helps.

Nov 15, 2011 | Cars & Trucks

1 Answer

Engine surges. Idles good. sitting still in park, rev the engine and the surging is very evident as when driving. Fuel filter has been changed


hook a vacuum gauge to the intake manifold and, check for a vacuum leak in vacuum hoses and, fittings

Jun 01, 2009 | 1988 Chrysler LeBaron

1 Answer

2006 Taurus surges


Take your car into an Autozone. They do free engine diagnosis when the check engine light is on. They'll hook it up to a reader and it'll give them a code to cross reference. That'll at least let you know why your check engine light came on. I'm sure it has something to do with the surging as well. You'll at least have a better idea of where to begin looking.

Jun 01, 2009 | 2006 Ford Taurus

1 Answer

Engine surges at rpm over 1500


Look for a vacuum leak (lines and intake), Is the engine light on, were any codes present? A faulty EGR or IAC could cause the problem too. Check the throttle cable for any restrictions.

May 27, 2009 | 1996 Chevrolet Cavalier

2 Answers

Rough idle / engine surges until power is applied


Sounds like a possible vaccume hose leak?

Feb 07, 2009 | 1997 Chevrolet Astro

2 Answers

EGR Valve


An engine surge is usually caused by a fuel system management or drivetrain failure. The fuel management system utilizes sensors that monitor emission output and engine performance are communicating with the main ECM (Engine Control Module) controlling fuel mixture, timing and emission management systems. While the engine is surging the ECM is "hunting" by adjusting the fuel mixture and timing. These adjustment are made by the ECM in a isolating manner as the ECM tries to satisfy its coordinates.
These coordinates are not satisfied because of a system malfunction.
Test for DTS's (Diagnostic Trouble Codes)

Jul 25, 2008 | 2004 Volkswagen Beetle

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