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Have model 136,hard starting,only starts with fuel squirted down spark plug entry,also has bad flatspot when starting to throttle,could this problem be in carby? Ian.T

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Plug gap is the most common problem in hard starts, once its running,, you can adjust the carb

Posted on Aug 03, 2010


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I had a coil pack that I just change less than seven days prior burn up then I change out but not it will crank but not start im stumped it is a Mitsubishi endeavor 2004 6cyl.


Assuming your spark plug firing order is correct after the coil pack replacement and your plugs and plug wires are clean and connected properly--and you have gas in the vehicle--I am thinking Throttle Position Sensor (TPS).
To test the TPS you hold the throttle pedal to the floor and start the vehicle, if the vehicle starts you need to clean or replace the TPS.

If the vehicle will still not start and everything was replaced on the vehicle as the parts came off of the vehicle--and the vehicle ran before think:
Compression: Washed cylinders (pull plugs and squirt clean oil in spark plug holes (one-two squirts).
Fuel: pull hose after fuel filter and crank vehicle
Spark: Pull plug wire and arc with screw driver when cranking engine. New coil pack could be faulty.

You may need someone to crank the vehicle (mind your hands) while you test. You should be able to find videos for spark testing.

I hope this helps.

Feb 09, 2016 | Mitsubishi Cars & Trucks

1 Answer

Poulan 40cc 18". Not starting. Muffler full of liquid (gas?). Very hard to pull with plug installed, easy with it removed. New plug, good spark.

You might have a hydraulic lock in the engine if you squirted too much fuel in the engine while trying to start it. take the plug out, hold the throttle wide open and pull starter rope 5-6 times to clear it. Put plug back in and try to start it.

Feb 21, 2015 | Poulan Garden

1 Answer

1993 pontiac grand prix 3.1 le stalls at normal driving speed and is hard to restart.After it restarts I can hold the gas down and put it gear and take off.It runs great with accellerator opened up wide.

that is flooding, (lots of causes that)
that throttle hold down is in the operators guide, called WOT unflood mode. it cut fuel 100% it starts via, excess fuel, in engine.
clears then starts and runs.
ever do a full tuneup?
Flooding. (engine good)
bad spark. Cold starts need perfect spark , unlike a hot engine.
so tune up time, for most cars 60,000 miles, some need sparks
every 39k (RTM read the manual in glove box,) it tells you.
as does the FSM state this, and how.
If flooding is not tune up related, then it is>
1: leaking injectors.
2: too high fuel pressure.
3: bad inputs to the PCM (like ECT reads too low temp) scan IT.
4: ISC stuck closed ,staring, the engine of air as start.
to test this #4 theory, (told in newer car operators guides) is to
start car with 10% throttle , start now? that may prove ISC stuck closed.

ever examine spark plugs, they speak volumn's.
these are new plugs, and are soaking in raw fuel.
on old plugs. its hopeless. (even weaker spark)
we use tools to find cause, got tools?


Jul 05, 2014 | 1993 Pontiac Grand Am

1 Answer

Spec vin ecu specs

If it turns, then the battery is OK. Either spark plugs are not firing in proper order (wrong firing order), no power to spark plugs, or no fuel because of fuel restrictions (dirty fuel filter). Inspect the air filter to ascertain its not clogged air. If you smell gas, then you saturated the spark plugs, which is why it refuses to run.
Let it sit for half hour to let spark plugs dry. Inspect to ascertain its not dirty spark plugs, which will also prevent engine from running. After ascertaining its proper firing order, spark plugs are clean, and there's power to distributor cap, ascertain there's fuel in fuel lines by squirting half second (short squirt) of starting fluid into air filter. Close the air filter housing to trap flammable starting fluid gas. Turn engine without giving throttle. Let starting fluid be ignited by spark plugs. If it won't start, then spark plugs are not firing to ignite starting fluid gas. If it starts briefly, but won't run when you give throttle, but catches when a 2nd person squirts more starting fluid into air filter just before engine stalls, then its a fuel restriction issue or no fuel in fuel lines.

Nov 29, 2013 | Cars & Trucks

1 Answer

My gmc jimmy truck starts with starting fluid then stopS

sounds like no gas getting to the carb. plugged fuel filter, fuel line, bad fuel pump. the carb should squirt a little gas when the throttle is pumped. leave ignition off while looking down the carb and pump the throttle linkage to visually check that gas is squirting down the carb with each stroke of the linkage. maybe you are just out of gas!!

Aug 25, 2012 | 1997 GMC Jimmy

1 Answer


Before you threw a bunch of parts at it maybe you should at least see if it has spark. If it doesn't have spark then the crank sensor and coil pack would be appropriate. If it is not getting fuel then the fuel pump, filter, etc. would be the way to go. So see if there is spark, do this by pulling a spark plug and see if there is spark out the end with it plugged into the wire and cranking it over. If there is spark put all this back together and squirt some fuel into the throttle body while cranking it over, if it tries to start but doesn't try to start on its own without squirting fuel in it then the fuel pump is bad. How many miles on it? Possibly the cam timing is off. Maybe take a compression check and see if the cam is out of time.

Mar 11, 2012 | 2001 Chevrolet Cavalier

2 Answers

Cranks but wont start

you need to check for spark at the plugs while cranking.then check for fuel entering the intake at the don`t say if its a 4 or 6 cylinder.if its a 4 cylinder you can look into the throttle body while someone cranks the motor and you should see fuel squirting into the intake.if you have no spark then check to make sure the cap and rotor is in good condition and the rotor is turning(if not then the timing belt maybe broken and needs replacing.also check the plugs as if they are worn so bad you won`t get any spark.a common problem on these is the coil pickup in the distributor going bad.there is a 2 wire connector that comes out of the distributor with a plug,if you follow this wire back into the distributor you will see the pickup.also check and see if you can hear the fuel pump running while cranking,you may have a bad fuel may have to remove the gas cap and listen at the filler neck or listen under the car were the gas tank is.if the fuel pump is not running then you can hit the fuel tank in the middle while someone cranks the motor and it might start.if so then the fuel pump is no good another common problem.there is a fuel pump relay under the hood on the drivers side that sometimes goes bad or there is bad connections.most of this checking is good for the 6 cylinder as well except you can see the fuel squirting into the could also be a bad computer that will have to be checked out at a shop.

Apr 10, 2011 | 1991 Plymouth Acclaim

1 Answer

91 s10 with 4.3 very hard starting cold or hot,if i give it a squirt of fuel down the throttle body it starts right away.Have replace fuel filter,fuel pump,and plugs.

When you replaced the pump, did you replace the hose between the pump and the sending unit? Check the fuel pressure. It should be 11-13 psi.

Sep 23, 2010 | 1991 Chevrolet S-10

1 Answer

Won't start, won't fire after starting fluid is used, checked spark and its blue and very small. Has new plug. Suspect bad magneto, can it be tested? Thanks Don't know model, label on handle says Poulan...

First off you should never use starting fluid on a 2 cycle engine. Serious damage to the piston and combustion chamber could result. Try changing the spark plug and if it's neccessary to prime to start use a squirt bottle with the same fuel/oil mixture as required to run your machine. Try squirting a small amount into the combustion chamber through the spark plug hole. Squirt,replace spark plug,and start. Starting fluid also washes the cylinder of an oil and it could cause a siezure of the piston.

Sep 22, 2010 | Poulan 25cc 2-Cycle Gas Powered String...

1 Answer

Have a chevy malibu that would not start up, it trys to but no firer maybe the fuel pump might be bad.

basics: spark,fuel,air,compression make an engine run.does it have spark? take a plug out put the wire back on it, ground the body of the plug to metal on engine. have someone crank it over, spark?y-n?yes ok move on to fuel. no, check for spark at the distributor cap.eliminate possible problems one by one.check for fuel flow. take air cleaner off the carb.if carbureated. pump throttle while looking down carb. throat.fuel should squirt into carb below choke plate.{hold it open while looking}fuel? y-n? no: check for fuel flow fron gas line into carb. remove fuel line andcatch fuel from the line in a container while helper cranks fuel, probably bad fuel pump.etc. good luck

Dec 21, 2009 | RTO Fuel Pump Carburetor Transmission...

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