Question about 2003 Chevrolet Blazer

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When I was checking my coil for spark it was sparking through my tester but then my fuel pump relay started clicking very fast and no more spark from coil . the relay is good i have switched it with other working relays. I originally thougt that the fuel pump was the problem for my blazer not running or starting but If there is no spark because of the relay buzzing sounds like a short.

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6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: TRUCK STARTS OCCASIONALLY, WHEN IT

I have a '99 suburban and had the same problem. Couldn't figure it out. Took it to the dealer, and it was a engine disable type module. There is a sensor in the ignition switch that "sees" the key (connected to this module), and allows the engine to start/run. Could be the sensor or the module. My problem was the module. Seem to remember costing about $500 with troubleshooting, parts, labor. Good luck.

Posted on Sep 27, 2008

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csmock132
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SOURCE: no fuel no spark 1990 k5 blazer 350

Take off the distributor cap. Check the star wheel that is splined to the distributor shaft that the pick-up coil uses. Make sure this wheel is not loose on the distributor shaft. It is right above the pick-up. If it is loose, replace the distributor. This is a common problem. If it needs one, all the part stores stock the distributor.

Posted on Mar 08, 2009

  • 245 Answers

SOURCE: engine would not start after shut down check fuse,relay seems to be good change fuel pump and getting power to pump not building up any pressure from fuel bleeder,coil has good spark(blue) when i prim

you either have a clogged filter or a bad fuel pump.

Posted on May 24, 2009

  • 1 Answer

SOURCE: no spark when trying to start the engine on 98 chevy blazer

I have a 98 bravada where I was not getting no spark and no fuel, after replacing few parts it came down to the ECM fuse was blown. After replacing the fuse it ran for 20 seconds and stopped again. It blew fuse again. Put 30 amp fuse and it continues to run. Problem now is the heating and cooling is off. Been told could be a short in cable or something in ECM is shorting. Was told by parts guy at Checkers that if putting higher amp fuse in blows as well there is definite problem with ECM. As of now have not had ECM checked.

Posted on Mar 04, 2010

csmock132
  • 4669 Answers

SOURCE: 1994 s10 blazer no spark

Sounds like the ignition module. Do you know if it is tbi or cpi?

Posted on Mar 28, 2010

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Isuzu died while driving now it turns over but dont start what should i check for


Fuel system -
Fuel pump relay, fuel pump and filter...
Electrical system-
Spark plugs, leads, distributor or coil pack.

You can buy a spark tester and if you have spark i would suggest a fuel issue.. Also check your owner manual as some cars have a fuel cut off switch and you might need to reset it

Jan 26, 2014 | Toyota Pickup Cars & Trucks

Tip

Car Won' Start


Car won't start?
First thing would be to check all your fuses. Most fuse boxes are located under the driver side dash panel. Some cars do have an extra set of fuses on passenger side kick panel (foot area on door side)
If all fuses are good, then next thing would be to test your relays with an ohmmeter.
If all your your relays and fuses are good, you will want to check for fuel and spark. A car needs air, fuel and spark to run.
To check for spark, you can purchase and use a spark tester.
If you cannot obtain a spark tester, then the next best thing would be an ohmmeter. You can test the power coming from your coil packs or distributor depending on what you have. On distributorless vehicles (one with coil packs) the coil pack are attached to an ignition module. This module is powered by the Crankshaft Position Sensor. This sensor can be tested with an ohmmeter. The Crankshaft Position Sensor is the first thing to be tested if you have no spark in any cylinder. If you have spark in some cylinders but not all, then check the coil pack (1 pack per 2 cylinders).
If you have a distributor, test the coil that provides the spark.
If you have plenty of good strong spark, then the next step would be to check for fuel.
Fuel system consists of Fuel Tank, Fuel Pump, Fuel pump Relay, Fuel Filter, Fuel Pressure Regulator and finally carberator or injectors.
Fuel injected systems have a fuel rail. On the fuel rail is a test port for fuel pressure. If you have a fuel pressure tester you can test how much fuel pressure you have. Or you can place a rag over the valve and press it in to see if there is pressure. If not pressure, check that pump is running. You should hear it run for a few seconds when key is first placed in the ON position. If pump is not running, check fuses and pump relay.
If pump is running but fuel pressure is low, check for leaks, plugged fuel filter, or leaky injector.
If your check engine light is on, then you likely have a faulty sensor or circuit and should have the engine codes read with a code reader/scanner to pinpoint exact problem area.

For more info, ask an expert at www.fixya.com

on Mar 25, 2010 | Alfa Romeo 164 Cars & Trucks

Tip

Car won't start? First thing would be to check all your fuses. Most fuse boxes...


Car won't start?
First thing would be to check all your fuses. Most fuse boxes are located under the driver side dash panel. Some cars do have an extra set of fuses on passenger side kick panel (foot area on door side)

If all fuses are good, then next thing would be to test your relays with an ohmmeter.

If all your your relays and fuses are good, you will want to check for fuel and spark. A car needs air, fuel and spark to run.

To check for spark, you can purchase and use a spark tester.
If you cannot obtain a spark tester, then the next best thing would be an ohmmeter. You can test the power coming from your coil packs or distributor depending on what you have. On distributorless vehicles (one with coil packs) the coil pack are attached to an ignition module. This module is powered by the Crankshaft Position Sensor. This sensor can be tested with an ohmmeter. The Crankshaft Position Sensor is the first thing to be tested if you have no spark in any cylinder. If you have spark in some cylinders but not all, then check the coil pack (1 pack per 2 cylinders).

If you have a distributor, test the coil that provides the spark.

If you have plenty of good strong spark, then the next step would be to check for fuel.
Fuel system consists of Fuel Tank, Fuel Pump, Fuel pump Relay, Fuel Filter, Fuel Pressure Regulator and finally carberator or injectors.

Fuel injected systems have a fuel rail. On the fuel rail is a test port for fuel pressure. If you have a fuel pressure tester you can test how much fuel pressure you have. Or you can place a rag over the valve and press it in to see if there is pressure. If not pressure, check that pump is running. You should hear it run for a few seconds when key is first placed in the ON position. If pump is not running, check fuses and pump relay.
If pump is running but fuel pressure is low, check for leaks, plugged fuel filter, or leaky injector.

on Mar 25, 2010 | 1999 Saturn SL

1 Answer

Wont start


is the your car engine cranking when you try to start, first check spark plugs ignition coils, remove one ignition coil and spark plug fix the spark plug in to the ignition coil then connect ignition coil to wiring and keep spark plug body touching on ground of engine head mettle parts, ask some one to crank engine then you can see is the plug sparking or not, do the same way to all the coils and plug otherwise you have to buy a ignition spark tester, is the all the coils and spark plugs are OK then check the fuel pump, it's sitting in under rear seat, before that do one thing disconnect oxygen (O2) sensor wiring and crank engine, the thing is if your oxygen sensor completely dead fuel pump will stop working, if engine start after disconnect O2 sensor, replace new O2 sensor, otherwise need to check fuel pump relay fuse and fuel pump. is this information helped you? please vote me and give a comment.

Oct 15, 2010 | 1998 BMW M3

1 Answer

I just replaced the main relay on my 92 honda accord and it still will not start and D4 continues to flash


First make sure your new main relay is working. After you turn the key two clicks, point your ear towards the back seat and see if you can hear the fuel pump running. It should run for about two seconds (or as long as the check engine light says on) and then go off. You should hear the relay click under the dash after the check engine light goes out, and that will be the relay turning off the fuel pump. If don't hear the pump running or the click of the relay, the new relay might not be working. If you hear the click and not the pump, the you probably have fuel pump issue. Check fuses first!

If both of those check out, then you need to make sure you have spark. Get a spark tester ($7) and a spark plug gapping tool ($1) from you local auto parts store (oreilly's, autozone, advance auto parts, etc), but don't get one of those in-line spark testers because it will be really hard to get the wire all the way down the spark plug tube and back on to the spark plug. Get one like the pic below.

.263848a.jpg
Set the gap on the tester between .039" and .043" using the gaping tool, then connect one of the spark plug cables to the tester, and then use the clip on the tester to connect it to a solid ground on the car. There shoud be a good place on the right side of the valve cover on top of the engine...you should see a small wire bolted from the corner going to the power steering pump. Put it right on the bolt. Give the car a few cranks and see if it sparks. If not, you probably have a bad coil or ignitor, both are inside the distributer. There are ways to check for those if they are bad, but that is for another post. One other thing to check is for corrosion on the contacts inside distibuter cap. You can either scrape it clean or just buy a new cap & roter.

The D4 light is from the TCU (transmission control unit)...letting you know that there is an issue somewhere. I already have another post here about how to diagnose it.

Oct 07, 2010 | 1992 Honda Accord

Tip

Car won't start? First thing would be to check all your fuses. Most fuse boxes...


Car won't start?
First thing would be to check all your fuses. Most fuse boxes are located under the driver side dash panel. Some cars do have an extra set of fuses on passenger side kick panel (foot area on door side)

If all fuses are good, then next thing would be to test your relays with an ohmmeter.

If all your your relays and fuses are good, you will want to check for fuel and spark. A car needs air, fuel and spark to run.

To check for spark, you can purchase and use a spark tester.
If you cannot obtain a spark tester, then the next best thing would be an ohmmeter. You can test the power coming from your coil packs or distributor depending on what you have. On distributorless vehicles (one with coil packs) the coil pack are attached to an ignition module. This module is powered by the Crankshaft Position Sensor. This sensor can be tested with an ohmmeter. The Crankshaft Position Sensor is the first thing to be tested if you have no spark in any cylinder. If you have spark in some cylinders but not all, then check the coil pack (1 pack per 2 cylinders).

If you have a distributor, test the coil that provides the spark.

If you have plenty of good strong spark, then the next step would be to check for fuel.
Fuel system consists of Fuel Tank, Fuel Pump, Fuel pump Relay, Fuel Filter, Fuel Pressure Regulator and finally carberator or injectors.

Fuel injected systems have a fuel rail. On the fuel rail is a test port for fuel pressure. If you have a fuel pressure tester you can test how much fuel pressure you have. Or you can place a rag over the valve and press it in to see if there is pressure. If not pressure, check that pump is running. You should hear it run for a few seconds when key is first placed in the ON position. If pump is not running, check fuses and pump relay.
If pump is running but fuel pressure is low, check for leaks, plugged fuel filter, or leaky injector.

on Mar 25, 2010 | Acura CL Cars & Trucks

2 Answers

Enging turns over but wont start up


year and model and engine size if applicable

Sep 10, 2010 | Honda Accord Cars & Trucks

2 Answers

99 chevy blazer cranks but wont start


CHECK BATTERY VOLTAGE FIRST IT SHOULD BE 12.5 VOLTS.IF NOT REPLACE BATTERY HAVE ALTERNATOR CHECKED.IF BATTERY GOOD.HAVE VECHICLE SCAN FOR PCM PROBLEMS - CRANKSHAFT SENSOR PROBLEMS OR CAMSHAFT SENSOR PROBLEMS.IF ALL IS GOOD GET A SPARK TESTER AND FUEL PUMP PRESSURE GAUGE TESTER.IF GETTING NO SPARK PROBLEM COULD BE LOOSE BAT.POWER SUPPLY WIRES AT IGNITION COIL MODULE OR IGNITION MODULE FAULTY.IF FUEL PUMP NOT RUNNING CHECK FUSE ABD RELAY IF BOTH IS GOOD FUEL PUMP FAULTY.

Apr 02, 2010 | 1999 Chevrolet Blazer

1 Answer

No start condition with my 2005 Ford Expedition. Engine spins but doesn't start. Have tried starter fluid. You can hear fuel pump start. Sounds as if there is not spark. Have checked all fuses and relays....


.Never use starting fluid you can ruin the engine fast.check all wiring to coils. get a spark tester pull a plug and turn it over watch for spark.

Sep 25, 2009 | 2005 Ford Expedition

1 Answer

Still does not start


Hello what you need to do first is determine fuel problem or spark problem when this happens again take your gas cover off the fuel filler listen for a hum from your fuel pump if its not present the pump is most likely bad if the fuel pump relay checked out good you need to test for spark buy your self a cheap spark tester that lights put it on to the coil check for spark while turning over if none present you need to trace from coil ,to ignition module,possible heating up cutting out goodluck please rate

Oct 02, 2008 | 2003 Dodge Grand Caravan AWD

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