Question about 1998 Nissan Altima

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1998 nissian altima engine floods at random

1998 nissian altima engine floods but will run at high rpm but puts out so much fuel that it leaks out of exhaust and will get into the oil, if it hits cat. converter it will burn problem is random. It has been sitting and it now started and runs fine. computer? fuel pressure regulator? fuel injectors?

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  • Anonymous Mar 21, 2014

    oil light blinking,have enough oil in it,had it checked



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Gosh, nissan spent 6 million dollars replacing faulty/leaking fuel injectors around that time ...maybe its worth a trip down to the dealer and do a campaign/recall search on your car...might be a car that was covered under that campaign and you might get injectors covered

Posted on Jun 23, 2009


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Changed fuel pump and inline filter,starts like its flooded and will run at high rpm,but surges at low rpm then dies like its flooding out,dont know what to do,could it be fouled plugs?

Any applicable trouble codes? Clean the throttle body and idle air system. Check for vacuum leaks.
I don't know year--make--model?
If a fuel problem, use a fuel pressure gage, check for correct pressure, then with key off, see if the pressure holds for a bit. If pressure drops like a rock then check for fuel pressure leak.

Oct 30, 2016 | Cars & Trucks

1 Answer

Suzuki Aerio 2004, will crank over floods out tho. Changed Plugs and Boots. New baterry too. Can smell gas @ Tail pipe. Wants to fire-but just won't catch. Where do I start looking for the answers.?

what engine? 2.3 or 2.5L?
all cylinders flooding??? spark tips on ALL dripping in gas?
check spark at all spark plugs ( ALL not just ONE)
if spark is good.
this engine is chain cam, so it makes huge noise before death.
did it?, nah
ok, so connect any $9 scan tool, and scan it. (barrow /rent.?)

you crank it for 5 seconds, not less.
and as you crank the scan tool RPM shows 250 to300 rpm and fails to start, the RPM on the tool shows you that the crank sensor is working
now release the key and do not turn off
look for DTC errors. got P0340,355? or any other DTC
that decodes to bad CMP or CKP/
yes, BINGO, the scan tool told you why spark is dead, or way off

the PCM will report Cmp or CKP errors even 1 in 6 pulses.
the PCM runs monitors against these 2 full time. and will see it fail.
and report, it, let it tell why spark is bad.
say spark is good. and still floods.
1: engine compresssion over 150psi? W.O.T?
2: flooding , i pull the fuel pump relay and crank now.
starts and runs for 3 -5 seconds, yes, that is the flood clearing
so i then try test fuel, runs perfect now (no fuel pump) ???
runs for 3 second, each test fuel usage. well good motor, good spark.
what more do you want? sure to run
so you have either insane high fuel pressure. or injectors leaking
can and does happen.
the tests are all in the FSM under injector and pump testing.
i check fuel pressure first. as its a mandatory thing.....
to factory spec. for unsaid engine.
then i do a injector leak down and balance check.
ask if you get this far.....????

Jan 24, 2014 | 2004 Suzuki Aerio

2 Answers

Chevy troubleshooting

Had a s10 one time and had similar problems turned out after I got rid of it a friend figured it out it was the computer and the Catalac converter how ever you spell it hope this helps Merry Christmas

Dec 09, 2017 | Cars & Trucks

1 Answer

2003 Nissian Altima 2.5

you may have max fuel pressure when the engine is not running because the pressure regulator( if its a vacuum regulator ) does not have vacuum until the engine is running (they increase fuel pressure as vacuum decreases) to answer the question the fuel pressure even at maximum will not keep the injectors from firing

Dec 10, 2012 | Cars & Trucks

1 Answer

I have a 1998 Chevy Lumina with the 3.8 litre engine, 197000 miles. The engine cranks up and runs fine until the engine warms up, then it stalls out and will not run. The engine will fire back up, but will...

One possible scenario is that the fuel pressure regulator is stuck in the high pressure mode because its vacuum diaphragm is leaking. High pressure mode is okay for cold starting. But as the engine warms up the high pressure setting leads to the fuel injectors injecting too much fuel and the engine floods out.

Feb 06, 2011 | Chevrolet Lumina Cars & Trucks

1 Answer

Car Randomly Stops

check the fuel pump also the fuse and relay

Jul 14, 2009 | 1998 Chevrolet S-10 Pickup

1 Answer

1998 Nissan Altima

Oh come on now. Mardavis, assuming you have a fuel injection system, you have what is known as a cold start valve. It seves the same purpose as a choke. It is computer contoled and upon cranking the computer fires a small injector which gives the engine a rich shot of fuel. If the cold start valve, also know as the 5th injector, guess what, it won't start.

Now, if by some reason your nissian still has a carb, it is close toa cut off, then you have a choke problem. Meaning your linkage is sticking and your high step cam is not being set.
Just thought you might wanta know.

Aug 01, 2008 | 1998 Nissan Altima

2 Answers

Truck idles rough but at higher RPM runs fine. Checked codes and it is randomly misfiring on all cylinders. Also every now and then when changing gears revs up on its own and even at a stop engine revs up,...

Sounds like either the EGR valve is leaking ( if it is it will be very hot), or you have a serious vacuum leak, take a can of carb spray, and spray around the intake manifold and see if the idle smooths out if it does you will need to repair the vacuum leak, it could be a vacuum hose or the intake itself leaking.

Jul 29, 2008 | 1998 Ford Ranger SuperCab

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