Question about 1988 Honda VFR 400 R NC24

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Engine wont start but turns over battery is ok can smell a little fuel which i assume means my filter is not blocked just wont fire up

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If it smells fuel means that you overfilled the cylinders with gas.Take out the spark plugs and check if they fire.That way you are checking the ignitions coils too.If they fire,install new spark plugs and crank the engine with the choke pulled and no throttle at all.Assuming that your carbs are cleaned and corectlly adjusted.
If the coils don't fire then you should check the pulse generator sensor and make sure that it's pulse is transfered all the way up to the ECU.

Posted on Jun 18, 2009

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Motor quit put new gas, charged battery, checked oil still does not turn over- prior to this the engine would backfire prior to starting- I have checked connections-


Does not turn over or does not start? Does not turn over usually means a bad battery or starter. Or connections which you have already checked. There may be a fuse block or inline fuse as well. Does it have a manual pull start as well? Does this turn over the engine or is it siezed up, low/no oil.
Turns over but does not fire usually is spark or the fuel. Back firing would guess spark plug or carberator (air fuel mixture) If it turns over but does not fire, try putting in some Seafoam fuel system cleaner. This will get the varnish-gunking stuff out of the carb. Mix in your tank, turn over quite a bit to get it pulled into your carb bowl and into some of the carb port holes. Let it soak a while and then turn over again every so often to pull in new cleaner. If it starts at some point it will stink a little while burning the cleaner in the tank.

Make sure you have check the old fuel lines and and air vacuum lines for pin holes and cracks as well. Change the plugs. Make sure the air filter is clean. Change the fuel filter. Does it fire if you shoot starter fluid in the carb air intake, this would suggest a fuel issue, such as dirty carb, bad fuel line or fuel filter, or fuel pump.

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you didnt stated the symptoms correctly

it either cranks or it does not.
that means the starter ACTUALLY turns the cranks shaft over
robustly.
the crank shaft damper pulley is the clue to this , it turns or not.
if it always turns this is a :
cranks ok but wont start.
so, that means tune up the engine,
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2: never tuned up this decade?.
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1 Answer

My 2003 camry wont start what could be the problem


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1 Answer

2000 olds 3.5 Dohc. Changed fuel filter checked fuel pressure @40 lbs resting cranking 45 lbs When i try and start it in the morning indoors won't fire crank the key to acc then on then back to acc then...


Which is the problem, no fire, or no crank. No fire means to spark to engine, but engine turns over fine. No crank means engine won't turn over when key is turned. I'm assuming engine will not turn over. Three most common problems. 1. Weak battery (get tested at auto parts store). Will hold charge for short time once started, but loses it when sits overnight. 2. Bad starter. Possible but not likely, still not out of the question. 3. Bad battery cables. This is an easy test. Take a pair of jumper cables and bypass the battery cables by connecting black side of jumper cable to "-" of battery and block of engine, and red of jumper cables to "+" of battery and (tap) Battery terminal post on starter...engine should turn over. Ensure you take all safety precautions to prevent car from moving during this procedure. Best of luck resolving this problem.

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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.

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1 Answer

Engine turns over but will not fire


Don't know why you would expect to smell gas

Could be the fuel pump

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1 Answer

94 chevy s10 4.3 engine wont start but it will turn over has fuel pressure and when you spray a little gas in the intake it cranks up but then stops


fuel starvation ie blocked filter /blocked pipe / as no fuel is reaching the cylinders
BUT FUEL IN INTACE AND STARTS BUT WONT RUN THIS IS BECAUSE THE FUEL BURNS AND STARTS THE ENGINE THEN STALLS AS NO FUEL CHECK ALL FUEL FILTERS AND FUEL LINE FIRST CHEAPEST OPTION

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1 Answer

1992 mercury sable will turn over but wont start


Make sure battery has a full charge. If it cranks good but won't start, check the basics. Have a helper crank it while you visually check for spark at the spark plugs, if spark everywhere, use a gage and check proper fuel pressure. I looked at info for the 3.8L engine, 35--40 psi. Also, after you build fuel pressure, turn off the key, see if fuel pressure holds for a bit? If the pressure drops like a rock, check for fuel pressure leak. Check the vac line for fuel pressure regulator, if it has gas in it, the regulator is faulty, or a leaking fuel injector. The pressure could also drain back through fuel pump.
Also, check fuel injector pulse, engine cranking. Any applicable trouble codes?
Smell of the crankcase oil dipstick, if it smells like gas, either you don't change oil and filter very often or the engine is running very rich for some reason.

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1 Answer

My 1997 GMC Sierra 5.0 Litter wont start and i changed the fuel pump regulator, what might be the problem?


engines need 3 things to start (petrol engine)
fuel, air and a spark,
as you have been working on your fuel system it is best to suspect this system first,
on engine turn over see if you can smell fuel at the exhaust.
if you smell fuel the fuel regulation mybe too high and the engine is flooding.
if you do not smell fuel, remove fuel line from engine and ensure fuel is getting to the engine,
(be careful not to let fuel spill this generates a fire risk)..
once fuel is getting to the engine, check your ignition system to ensure you have a good spark to ignite the fuel.
finally check your air filter is not blocked and that you have air getting to the engine.

I hope this was helpful.

Jan 11, 2011 | 1997 GMC Sierra

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