Tip & How-To about Ford Focus

Modern cars are not hard to troubleshoot

All cars; new or, old. follow the same laws of physics.
fuel+air+electricity=running engine.
So; first we look for fuel: there are two ways to do this: while turning the key to run
lean out of the driver's seat and, listen for a short 2-3 sec. buzz; this will be the electric
in-tank fuel pump starting up, holding pressure and, shutting off to wait for a demand for fuel
if you hear this the fuel delivery system is good.
Next; we look for; spark (electricity) the only safe way to troubleshoot modern computerized
ignitions is with a inductive timing light; hook the timing light power lead clips to:
the car's battery: red to the positive post and, black to the negative post; then: take
the inductive clamp and, hook it around a spark plug wire; any wire will do:
crank the engine and, count between the flashes a four cylinder will flash either every time if the clamp is on a main lead or, once every four times the engine rotates again. of course the count is: six for a six cylinder; eight for an eight etc.
No spark? ignition has failed. Next: air in the intake of your car is a small flap attached to a switch; open the intake and, crank the engine while spraying starter fluid (ether) into the intake engine starts then dies; fuel filter failure; no start: flap switch failure (no fancy names here)
engine runs replace air filter. of course this doesn't cover everything sometimes even we
mechanics get stumped; but, this should at least prevent you from not spending a fortune to
fix your car

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2 Answers

96 olds lss had fuel pump replaced wont stay started long sputter spits ect.

You better find a different mechanic . Before calling a bad fuel pump ,did he do fuel pressure test ? Did he test the electrical circuit ? Did he check mass air flow sensor ,injectors , fuel regulator , engine senors ? How many miles on the vehicle , is the engine in good shape ? Timing chain ?

Aug 05, 2016 | Cars & Trucks

3 Answers

2000 Jeep Grand Cherokee Laredo 4.7 liter code reads p0307 turn the car off when I turn it back on started misfiring and sputtering and wont stay started now help

code p 0307 is misfiring on no 7 cylinder ====causes --- engine mechanical fault ---wiring---ignition/ fuel system--injector --ECT/MAF sensor---ECM
look for low fuel pressure or ignition control module

May 31, 2016 | 2000 Jeep Grand Cherokee Laredo

2 Answers

what is causing my 2004 suzuki verona to what is causing my 2004 suzuki verona start but dies immediately...if i give it gas and shift quickly i can go but will die as soon as i slow down at a stop

hot and cold engine, both , and restarts hot?
no engine state? or country.
all answers USA cars.

there are no less than 50 causes of stalls.

do you have tools? (meters and gauges and a scan tool)???
id bet not, right? so do say so...
so ill not list all 50 , cans send the list , have one. ask.

ill do the laws of physics, and for mr, otto cycle engine (gas)
1: lost 12vdc to EFI parts. and spark (raw dc power)
2: engine lacks compression. (cylinders) 50 ways to fail just here.
3: lost spark? , failed to do the 60k mile tune up, seems right now?
4: lost fuel or too much fuel. (complex , ask)
5: EGR main valve stuck open. ( clean it)
6: Cat melted, due to #4 too rich. (vacuum test fails, ask)
7; Loss of fresh air to engine , can cause #4 due to packed up air cleaner filtler or ISC air valve stuck closed.

does this help or make you run to the first ASE mech you see.?

Mar 07, 2015 | 2004 Suzuki Verona

1 Answer

bad body throttle

old posts .
if it cranks all engine stall for the following reason.
(physics) in the proper order.
1: engine bad. (or cant breath) (compression loss huge 1 or more cylinders.
2: this engine 1.0L or 1.3 runs on GAS, and spark is next , no spark running end. (slow or fast, and is called misfiring)
3: bad fuel, (too much flooding its called or too little bogging and stalls)

1,2,3, its one of those 3 things
there 3 exceptions (kinda)
a: battery power ended, 12v became 8v and engine stalls, actually EFI goes (OFFLINE) when no power. to run it.
b: EGR stuck open. very common, make all the above useless when stuck open.

c: idle air, the engine need air to breath or it floods.
there are 2 parts related to this fact, IAC valves if many times. or ISC valves, that meter air hot or cold engine.
(thermal air valve or electric or both)
if they stick closed, no air now , engine stalls , unless you right hot foot the throttle pedal and save the stall., if that is super easy , you lost air !

the number 1 reason for stalls in not getting tuneup.
Are your spark plugs in car , antique?
going for the 10 year record on spark plugs, or spark wires.
then FILTERs.
to solve this riddle, the shop uses TOOLS, those tools.
Gauges , meters, scanners and scopes.
Make the job easy and fast.
why not ask a shop just to diagnose car. (be wise to tune up first and not have them prove to you with hours of labor proving, gee,
all these parts here, are useless. (aka. basic service points parts)

Apr 11, 2014 | 1997 Geo Metro

2 Answers

starts but shuts off then wont start

sounds like a immobilizer issue to me.

Feb 28, 2014 | 1988 Isuzu Trooper 2 Door

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