Question about 1997 GMC Yukon

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Engine will not fire

97 GMC Yukon 5.7L EFI, New long block installed engine has spark, fuel to intake but will not fire. Timing or Fuel?

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  • st_onge_rick May 28, 2009

    White spark bright blue base, new long block just went back together I will recheck the connectors

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  • GMC Master
  • 1,348 Answers

Is the spark blue?xheck all the connectors to the mfi iac and ignition module,and the distributor

Posted on May 28, 2009

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2 Answers

1997 Prism LSI. It cranks, but why won't it start?


redux 2
not car smart ?
and no photo of your ENGINE so we both fail
hard.


crude video, but is for folks with near zero tools
or shows you clearly why you dont want to do this.

https://www.youtube.com/watch?v=064Ilsz8Fzg&NR=1&feature=fvwp

so get car fixed
use a real mechanic.
see why?

the DIS engine started in July 1997 (mfg,date)
http://www.fixkick.com/PRIZM.html

facts.
so your does have a distributor (google that please)
but 1997 is also a big change, a new engine
end to end. july 1.

no photo of your engine,means NO JOY.
we can not guess engines
or what spark system used due to huge changes
in 1997, all related to USA smog laws.
fact.

Dec 14, 2015 | Geo Cars & Trucks

1 Answer

My '99 chevy truck with 5,7L 350 will start but wont stay running. put new fuel pump and relay switch in


First you must determine if the fuel is stopping or the spark is stopping..If the fuel is stopping this could be a computer problem.. If the spark is stopping then it could be the IGN Module in the distributer. or any nomber of sensors. Squirt a little fuel directly into the Throttle body on the intake manifold.. If the truck runs longer its probably loss of fuel.. Do this several times to make sure, be careful and only use a small amounty of fuel.. you do not want a fire.. RE: Spark: Take a plug wire and an old plug..put the wire on the plug.. hold the plug against a good ground .. have someone crank the engine .. does the plug stop firing? The engine dies.. and will not restart for a minuet or so.. during this "no start" time do the plug test. If the plug will not fire during this time take the module out and take it to Orillys Auto parts.. They can test it.. really expensive part. Don't replace until you know it is BAD..

May 14, 2014 | 1999 Chevrolet K1500

1 Answer

93 Honda Civic dx will not start. new fuel pump igniter, has spark


sorry if you guess and guess wrong. really, must be expensive.



ok got spark (and timing is good, timing light test)

if test fuel ( use instant start in a spray can) fails, with spark

then engine is bad, compression is checked, see near 80 not 150+ PSI , the timing belt has slipped. if not changed by the book

they slip and the engine grenades (or bends valves)



this is an interference engine, never ignore the belt.

there is an acid test order.

1 compression good.

2 spark good, and timed

3 fueling is last. (if spark plugs dry add fuel, by hand)



cant burn fuel with no compression and spark. well with EFI it cant run right with bent valves either.



here is Chad running an engine (any) with no gas tank

even his battery is dead. and has external battery. for 12v power.

a real trooper.

ive done this 1000s of times. in 60 years.

his engine only makes 80 psi (old) and still starts.

but EFI will never do that not that low. compression



the cam slips and goes retarded compression drops to near 1/2

and the valve timing is so bad, the exh opens late and pollutes the

next last intake charge. the card house falls and then the valve bend.



take if from me, nostarts are a blessing on any honda

maybe it saved your valves.? do the service on time./

Dec 29, 2013 | 1993 Honda Civic 4 Door

1 Answer

97 K1500 5.7 liter Engine quit running. I checked timing, spark & fuel. All good but high mileage made me think wear on timing chain. I replaced timing gears, chain & distributor drive gear. I put...


need to get back to basics, first check engine compression-you say that it's high mileage, so I'd start there-If you have uniform compression across the board, move on to fuel pressure at the top rail-if that is good, with spark it has to run, but make sure your distributor is properly installed (not out 180 degrees).

May 29, 2011 | 1997 Chevrolet K1500

1 Answer

98 Yukon won't start. There is power but it won't turnover.


R U sure your fuel pump is working? Can U hear it load and unload fuel pressure by
turning the key on and off? If you don't hear the fuel pump check the fuel pump
relay. Swap out the relay. You need to make sure the battery is charged. I
believe if the battery is less than 9 volts it will not start. You need to
check the fuel pressure while cranking. If U have a timing light check each
plug independently to make sure they are firing correctly. U should see a consistent
rhythm of flashing light. No need to point light at anything, just make sure it
is consistent.


Not knowing how much U have check already. Start with the basics. I installed new distributor,
rotor, and spark plus in both my 97 & 97 gmc 5.7L trucks. Five months later
I started to have problems with both about a week apart to a point I couldn't
get it to even start. I had bought the fancy Bosch 4 prong spark plugs. I did
the timing light thing and discovered that the distributor was jumping time due
to fowling inside the cap. I went back to the standard AC Delco products. I my
opinion is the pins in the cap are made with some metal material that corrodes
easily.

Jan 19, 2011 | 1997 GMC Yukon

1 Answer

1992 f150 back firing throu intake when cracking throttle breifly-soundslike only one cylinder backfire. stock engine-5.8lw(efi) with headers and roller cam, engine recently rebuilt


backfire is the igniting of fuel in the intake. Can be, timing, valves not adjusted right, cam worn flat on one lobe are usually the first places to look.
check it out.

Apr 15, 2010 | 1999 GMC Jimmy

2 Answers

I have a 1999 gmc Yukon it is getting fuel and spark i even sprayed starter fluid in the intake but it still wont start it turns over good but wont start


ok make sure you have good fuel pressure
you must have good spark must fire a spark tester
if all that is good then check compression
and don't use STARTER FLUID on a GAS ENGINE it can blow a hole through the piston
hope this helps

Nov 12, 2009 | 1999 GMC Yukon

2 Answers

Im getting spark for the plugs and im getting fuel. i even put starter fluid in the intake and gas but it wont start it just turns over and nothing


A 1999 GMC Yukon has a fuel-injected engine. They are known for the fuel injector lines inside the intake plenum to break and flood the engine. If you are pouring starter fluid and gas in the intake you are only making it worse. replace the injector assembly with the "new improved" injector assembly and replace the plugs, then it will probably start.

This subject is covered by GM Technical Service Bulletin No.: 00-06-04-003B

See GM Parts List below. This replacement Injector assembly is now also available in the aftermarket.
f098b90.gif

Nov 11, 2009 | 1999 GMC Yukon

1 Answer

97 chrysler concorde 3.5 bad accel off idle , ok on high end


check your air intake control switch: it is on the manifold and, is attached to a flap inside the intake; this switch's flap should be easily moved by the air from the aircleaner and, tells the engine computer that you have the right amount of air coming into the engine for fast acceleration if it fails the engine computer will not know the amount of air available to sustain rapid spark speed lastly check the installation of your air filter I have seen very dirty ones and, some inserted upsidedown there is an arrow that should point to the engine

Jan 01, 2009 | 1996 GMC Yukon

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