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2003 ENVOY ENGINE FLOOD COLD

Very intermittant, on cold start engine will flood so bad it instantly washes out cylinders and engine cranks over like the spark plugsare out of it. after letting sit for a few minutes it will eventually start, runs rough until all the fuel is blown out

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Posted on Jan 02, 2017

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SOURCE: hard cold start 96 safari

Check fuel presure.I believe its 61 to 65 psi, with little or no drop off in ten minutes.V-6 access port for fuel presure is at left rear of engine,(remove dog house to access). Fuel pump is in fuel tank.Use AC Delco only, there is a updated wire harness conector for these.

Posted on Jan 17, 2009

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SOURCE: 1996 Toyota Tacoma wont start when the engine is hot and sits a few minutes

I Hope You All Appreciate This FAST and EASY Inexpensive Repair That Even The Toyota Dealers Dont Seem To Know How To Fix !!! The Problem Is The Air filter temp sensor. Look On The Left Side Of the Air Filter Housing and Disconnect The Plug Thats Attached To The Spark Plug Like Plastic Sensor Mounted on The Side Of the Air Filter Housing, Now Go Start Your Truck !!! Your Truck Will Start And RUN Fine Now ! Replace The Sensor Approx $59 at Autozone... This Should Fix 90% Of Your Problems If your In the other 10% and it does not Fix it , Email Me and Ill See If I Can Help ! People Have Spent Hundreds and into The Thousand Dollar Area Trying to Resolve This Intermittant Problem At Inept Shops with Illiterate Mechanics ! If Your Happy With This Fix, BE Generouse ! I Do Accept Donations at Paypal Send to donsgirl89@yahoo.com Thank You JOE Mechaniac

Posted on May 18, 2009

ourhowse
  • 2007 Answers

SOURCE: 03 Altima 2.5, Wont turn over on cold start

First, change the fuel filter, and make sure the lines are good. Check the intake manifold bolts for tighness, check all vacuum lines. Best to have it running, wiggle them around and listen for a hiss. Lastly, change idle control sensor, if the other suggestions don't make a difference.

Posted on Jun 30, 2009

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SOURCE: 1991Chevy Lumina does not start

I didnt see it in your list, so I would suggest the O2 sensor, usally found on the exhuast pipe near the engine or on the back of the engine

Posted on Sep 21, 2009

speedboy8765
  • 6 Answers

SOURCE: hard cold start - engine will crank for a minute or more before it catches. runs rough until up to operating temp.

check voltages in the battery and have your alternator checked a bad battery could delay engine starts until the alternator can charge it enough to start and if the battery is still bad then it will run off your alternator drawing alot of power sucking the battery dry and feeding off your alternator

Posted on May 02, 2012

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1997 ford contour will not start after replacing transmission why not?


Check your electrical connections especially the throttle position sensor, and the cam position sensor. One other thing to look at is the two coolant temp sensors. One on the front is for the dash gauge, the other on top is for the PCM reference. Ie cold engine, full choke. Warm engine, lean open choke. if not connected it's like trying to start a cold engine without a choke closed, and you end up flooding the cylinders with gas washing them out and killing compression. also ensure you connected the idle air control valve electrical connection. It's located under the throttle body at the back of the engine towards the top. hard to get to but it won't allow the engine to start or idle.

Apr 08, 2015 | 1997 Ford Contour

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Injector sprays too much fuel after starting. Engine floods out


Suspect (potentially) either a stuck injector, or a failed/failing fuel pressure regulator. One sign of a failed fuel pressure regulator can be gas in the oil. (I suffered that side effect, along with bogging, and black smoke rich running, worsening as warmed up, turned out to be fuel pressure regulator). If the injector is loose in the throttle body, or has bad o-rings, can also cause some wonky behavior. Good luck.

Mar 14, 2015 | 1992 Geo Tracker

1 Answer

Car starts when cold not when hot


If it cranks normally when hot, could be that an injector is leaking enough to slightly flood engine and this is okay when cold. Could also be cold start injector is not completely shutting off when hot.

Dec 18, 2014 | Cars & Trucks

1 Answer

When its very cold outside my 2003 corolla will not start just changed plugs and temp senser we can put a heat light at the firewall by the temp senser for 30 min or so and she will usally fire.


wow, no engine option stated, !!!

how cold is cold, we dont know, ALASKA -50F or Keywest at +80F

what temp sensors , there can be many.

my 08 has 3 on engine,. one in tranny, and 1 in front corner for my outside airtemp option with compass.



the one that counts is the ECT, and this sensos is screwed deep

into the waterjacket or in the thermostat housing, vastly hard to heat up by hand that. for sure heating up the thermal mass of and engine

with a heat lamp is near impossible. so where is it. EXACTLY.



are you running old fuel.?

running summer fuel?

Is CEL (MIL) lamp glowing when it does run?????





hard cold starts are caused by many things.

Just too cold is one (spend time in alaska and see)

Weak spark, check it at each

you connect scan tool, early in the morn. and see if the ECT and IAT

read near the same and near outdoor (where car is parked) temperature. if yes, he ECT and IAT are working.

once started the ECT will rise to 180F or more and hOLD; does it?

if in fact you did by change warm the ECT artifically and start easy

that means the engine is flooding.

my guess is you didnt do diagnosis at bad start time.

(spark tips soaking with fuel) leaking injectors on one or more cyl?

check all sparks for flooding, not just one,

if it is flooded, the operators guide says (RTM) top crank with the throttle held open and this cuts fuel and flood engine starts.

other causes aplenty

too high fuel pressure

leaking injectors

weak spark at any cylinder, got P030x DTC codes from scan tool?

weak compression on any cyl. (sticking valves? cold) (gage it)

if the engine is good, good compression that leaves 2 more.

weak spark (if all spark plugs are strong cranking) then....

or bad fueling,



bad fueling can be.

bad fuel

leaking injectors, (for 3 reasons)

ECU is overfueling, (ECT reads way too low than reality)

The engine has 2 more sensors that can cause over or under fueling

THE MAP or MAF, you didnt say which engine so cant guess.



MAP vacuum port clogged with PCV cloud of death , gunk,.

MAF hot wire coked up, clean it.

the maf coked will cause lean starts.

the mAP can fail 2 ways, stuck at high or low pressure.

stuck high is way more common, this causes flooding.

there are other reasons.



1: EGR main stuck open ( bad news. it floods the intake with exhaust gases and that really wrecks combution to start any engine.

2: ISC stuck closed, (flooding)



or a MAF based engine with any form of induction leaks (vacuum leaks)



i think i hit them all (hope), and there are tests for each case.

ask.

Feb 06, 2014 | 2003 Toyota Corolla

1 Answer

Engine will not turn over after cold weather


which engine?

cranks but will not start or remain running

tune up time, cold damp cause spark parts bad

oldest story in world. damp conducts, bad insulators do wet.

end result , bad spark.

flooding ? crank wide open throttle, (oper, guide, on start page.s...)_



check spark..,got spark to all cylinders

yes,

try test fuel, if not flooded,

starts then stalls?

Jan 11, 2014 | 1998 Toyota Avalon

1 Answer

My car starts fine when engine is warm. I turn it off then try starting it again. then starts up and shuts back off. does it like 3 times in a row. then I wait a few minutes then it starts up when I push...


stalls, are complex
if the engine is good (compression at spec)
it this list.
1: lost electric power to EFI system or spark.
2: bad fuel.
3: bad spark.
4: bad fueling. (too much or too little.
5: EGR stuck open
6: ISC dead. or IAC dead. (idle air valves failing cold)

there are tests for each.
cold start failure only ! all else good, engine tuneup done?
1: ECT fibbing like oh'bummer. (signals water temps of alaska in Panama? "floods, and your right foot helps./..........
2: IAC (cold start fast idle air valve bad) same for right foot....
3: check engine light on running? is it?

ECT can cause gross over fueling.
the IAC dead will cause gross under AIR which in fact causes flooding (less air plus same fuel = flood)
bad fuel.


Oct 12, 2013 | 1999 Honda Accord

1 Answer

Trys to flood on cold start


what vechicle type model and the year.older cars carb type if automatic choke not working or vacuum pull off not working carb will flood out engine.for cold start up engine need good spark and fuel.if engine flooding could have weak spark due to worn out spark plugs and wires.could have vacuum leak or bad engine coolant temperature sensor.dirty air filter.dirty fuel injectors.

Dec 20, 2012 | Cars & Trucks

1 Answer

I have a 97 corolla, when I first start it in the morning it starts fairly easy, but when it warms up and im running errands around town, it cranks longer before it wants to restart, and its getting worse,...


The engine coolant temperature sensor could be stuck in the cold mode. This would activate the cold start injector even with the engine warm--and flood the engine with too much fuel, making for long crank times. The engine coolant temperature sensor (ECT) is usually located close to the thermostat housing. It has two wires coming from it. The coolant temperature sender for the dash gauge is not the same. It only has one wire and grounds through the engine block. It is easy to get them confused.

Feb 02, 2011 | 1997 Toyota Corolla

1 Answer

Will not start on hot day's in the sun.[engine cranks normal]


The normal reason why a hot engine doesn't start is the choke. Your fancy new range rover will have a computer controlled choke that will be activiated by a temperature sensor. maybe this has failed or is disconnected
In my ancient range rover I have a manual choke but essentially the same engine. I know that if the motor is hot I can't start it with the choke on.
The way the choke works is it restricts the airflow into the engine so that there is a richer fuel / air mixture which is needed for a cold start. If the engine is hot and the choke comes on the engiine floods with petrol and there isn't enough oxygen for it too ignite in the cylinders. To start a flooded engine you have to open the choke and crank the motor without pressing the accelerator. This pumps out the petrol vapour and eventually it will fire and start. If the computer thinks it is cold because of a disconnected or faulty sensor it will put on the choke whenever you try and start and the engine will flood.
I think a vapour lock is unlikely unless you driving in extremely hot weather (above 40 degrees celsius).

Oct 08, 2008 | 2008 Land Rover Range Rover

1 Answer

1997 BMW M3 3.2 EVO


Your fuel injection pressure is probably leaking down causing gasoline to leak into the cylinders and resulting in a hard hot starting condition due to "flooding" of the engine. Try holding the accelerator pedal all the way to the floor of the car like your trying to go maximum speed down the highway and crank the engine for 10 seconds or less at a time. That tells your computer to enter the "clear flood" mode and stop injecting gas into the engine. Ask your repair shop to measure the fuel pressure and see if the pressure is bleeding off too rapidly.

Jun 28, 2008 | 1997 BMW M3

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