Question about 1996 Oldsmobile Bravada

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Im getting fuel, spark, and comprestion. I had a hard time getting the vehicle timed, but feel confedent that it is correct now. still wont start.

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Could be 180 degrees off wth distributor,check crank sensor,try spraying starting fluid in air box to see if it will crank,if so fuel problem

Posted on Jan 01, 2011


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1 Answer

Timing correct firing off

what engine Shawn. ? how can we guess that?
besides following the FSM steps, we could:
ive rebuilt many engines (done many from scratch) +machine work.

1: I check compression 1st. on all cylinders. (i put oil in the cyl, 1 teaspoon) (some pros run oil gallery primers pumps first in pro rebuild shops) i just crank the zero fuel engine until i see max oil pressure.)

oops. ? no oil pressure, oops, compression bad. on 1 jug.
(all that good, so)
2: i then crank it over , with no spark or fuel and check for top end oiling. Valve covers off. (so those V.C go on last)
ive watched many an noob burn up a new engine, not doing the steps in the rebuilders books. it only takes me 30min. to do this. why skip it.?

3: ok , I got top end oil, got 150psi on all jugs. (hard work pay back)

4: i check for spark all cyl. it's strong, & out comes the timing light.
oops, timing is off, or spark wires routed wrong, (dizzy engines)
i check all cylinders for hot spark and #1 timed right. and routed right.
the strobe light never ever lies to me....

5: wow ,car runs on test fuel (spray can, CRC engine start with top end lube feature) (fuel pump is shut off on purpose , in all steps to here)
i repeat this say 3 times, listening carefully for noises, that are not good. (why start the engine and watch it blow up. )
It is so good, to hear it run for 3 seconds,, wow.
im 100% sure you can get here..... if you do the steps.
Now comes, light the fires and kick the tires. not FIRST.

6: now comes fuel
how to get fueling to work.
that takes understanding the ASD and how to use a $1 NOID lamp.

I check injectors then add fuel pressure.
are the injectors firing?
injectors ,click cranking ?(stethoscope tool $5)
if not, use the NOID, is the PCM firing the NOID? y/n?

why do this , with pump dead.
Answer to not wreck your new rings, all washed free of all oil buy
injected, unburned raw fuel .. that is why.
i get all my injectors firing then , turn the fuel pump on.
its your hard labor, 50 hours? to build and engine?
wana waste all that? nah.
I last , plug my fuel pump back in,
does the PCM start enging for 2 seconds, and then cuts fuel?

ive never burned up a new engine, yet,
im not lucky, or smart, just had good teachers.

jeep ways!
I kill my pump by pulling the pump feed wire.
i do that because some newer jeeps , kill everything (ASD) including spark,
if you pull the fuel pump relay. (jeeps with new pump monitor features)
so i cut the feed AFT of the relay, on all cars. (conn. pulled)
the FSM shows this spot.

hope that helps.

Apr 01, 2014 | 1999 Jeep Grand Cherokee

1 Answer

Fuel pressure spark car wont start

code p0341 refers to cam shaft position sensor(CMP)sensor A bank1---range/performance problem===causes--insecure sensor/ rotor---air gap---wiring---CMP sensor.. I would pay attention to the sensor and the possible causes as listed because the timing of the engine is related to the position of the cam shaft. Timing is computer controlled and will not be "off" unless the CPU cannot get a definite position of the piston to set the timing

Mar 05, 2014 | Volkswagen Golf Cars & Trucks

1 Answer

Vehicle hard to start

Well id try fuel injecter cleaner

Sep 03, 2012 | 1994 Oldsmobile Silhouette

1 Answer


First, you need to understand that the starting system on that vehicle is DESIGNED to keep cranking the engine (even after you let go of the key). It will crank for approximately 15 seconds, then time out if the engine speed has not reached 700 RPM. Personally, I think this can be a serious safety hazzard, especially for someone working on the vehicle, but this is not the time or place to get into that.

To find out why it is not starting, you must first determine what is missing. The engine needs fuel, spark, and compression to start. One or more of these things are missing.

For the fuel. you not only need fuel in the fuel tank, but you must also have the correct fuel pressure (per manufacturer's specifications) and injector pulse (or injector control) - not to mention that the injectors themselves must be capable of functioning correctly when the control system tells them to.

For the spark, you need not only functioning coils, but the spark plugs must not be worn out and they cannot be "flooded" with gas or any other foreign substance like oil or antifreeze. Spark plug cables (or coil boots for COP ignition) must not be defective.

Compression is pretty much a mechanical problem. However, it can be an electronic problem if your vehicle is equipped with variable cam timing. (You didn't mention which engine your Caravan is equipped with, which would be a good idea if you would like someone to help you figure out your engine problem)

Now since fuel, spark, and compression can be controlled by the engine control computer in modern vehicle configurations, and the computer system is capable of self-diagnosis of these systems, it would be wise to BEGIN diagnosis by consulting with the onboard computer network that controls these things (AKA, scan your system for fault codes).

Apr 07, 2012 | 2008 Dodge Grand Caravan

2 Answers

Wont start after timing belt and water pump replaced

Sounds like your timing marks aren't set correctly. Make sure you have spark and fuel. (Injector pulse)

Mar 03, 2011 | 1995 Honda Passport

1 Answer

Need help with my 99 gmc yukon! replaced map sensor, and idle air control module. getting gas to shaffer valve, getting spark to the spark plugs. yellow fire.

Im guessing the vehicle wont start? If so you shouldnt rule out fuel just because your getting fuel to the shrader valve, these vehicle require a certain amount of fuel pressure to run, im guessing around 60psi, so i would check fuel pressure, if ok keep in mind that these vehicles also had a problem with early failure on the fuel injectors, GM sells a new design injector set up for them.

Nov 24, 2009 | 1999 GMC Yukon

1 Answer

3Lefi 914runner will not start.Ran rough and stalled codes 14+25

If youre vehicle has got spark(all the time) it is not your coil or any of the other electronics.Must be a fuel problem! Always remember: "If there is spark and fuel, it must start" BUT, keep in mind, spark at the right time(ignition timing), sparkplugs in good condition, good compression, valve clearance and timing correct,amount of fuel entering into the engine, fuel not contaminated with water? This is just a few possibilities. The list can carry on and on.


Sep 17, 2009 | 1989 Toyota 4Runner

1 Answer

At times, it's like there's no acceleration. Especially, when the vehicle comes to a complete stop; then once you continue, it feels like there is hardly any power. Give it about a few seconds, then it...

Is it a possible transmission problem?
Does the car start out in 1st gear?
....maybe it is starting off in 2nd or 3rd and kicking down into 1st once you get rolling?
Try and feel or hear if the RPM increases when you get the power back as it jerks.

Aug 23, 2009 | 2000 Ford Focus

2 Answers

Toyota wont start

get the comprestion tested on all cylinders.

Jul 04, 2009 | 1990 Toyota Camry

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