Question about 2006 Chevrolet Cobalt

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My 2006 cobalt cranks but dont start/

My 2006 cobalt cranks but dont start. already checked fuel pressure, and its good. what should i check for next?

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Spark, Timing

Posted on Apr 29, 2010

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The location of the fuel pump cut off switch on a 2005 Chevy Cobalt ?


There isn't one.
What testing have you done?
Make sure battery has a full charge. If it cranks good but won't start, have a helper crank it while you visually check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse. If your missing everything check for rpm signal. Any applicable trouble codes?
When you first turn on the key, no crank, can you hear the fuel pump run for a couple seconds? There is a fuel pump fuse in underhood fuse box.

May 29, 2017 | 2005 Chevrolet Cobalt

1 Answer

I have overhauled engine for Isuzu bighorn 1998 petrol/gasoline engine. the 6VE1.timing belt is ok. Still it has a had start.


is this the Single head cam or twin version?
no photo of engine, so answers will be weak.

double posted. is this the single cam or twin cam engine?????? per side, the twin cam has 4 cams. 2 /bank.
i can not understand your questions, at all.
ok you overhauled the engine,
nor can i understand , still hard start.
does that mean it cranks slow and turn runs and drive perfectly ?
or cranks fast, but hard to start and runs perfectly?
or does that mean it cranks fast, starts, then misfires and runs crapppy-pappy?
hark, the devil really is in the details, no?

Generic answer.
all the wires and sensors , hoses not put back correctly.
oil full, coolant full, fresh gas in tank,
then you crank engine with no spark (I pull fuses)
and the crank it until oil pressure is good. yah, do that.

if really savvy, we check for top end oiling next. cranked only.


ok looks like oil pressure is good,(I don't want to wreck a new engine) (also check compression on a new engine, to see if we messed up., if not 150psi or more, you timed it wrong)



then we crank it, ok, it cranks and don't start
I check spark and it's timing using my timing light, it's wrong, i retime it, no and its ok. as is ..
ok sparks good, on all 6 cylinders. checked carefully and for static time.

so now start engine on test fuel,
if fails, see above for why.!
ok it runs for say 2-3 seconds and stalls. good.
We yell at the gas engine gods. O'BOY my engine seems to be OK ! progress....

next is fueling , ill stop now, as typing a book on fuel injection
is not easy here.
but fuel pressure is next. on all EFI engines. as is good fuel.
when did car last drive perfectly, 1 month ago,
10 years. what?
if long ago, the gas is bad. as are related parts all gunked up, like filters, and injectors.
and even the pump, or its sock packed in GUNK.
as you can see we have no history on the car, so.
really anything is possible. even vandalism.

btw we never just throw and engine in a car.
we check.:
1: compression, gee even sitting on a pallet.!
why install (6hr labor) a dead engine,?
2: then cranked oil pressure, spark/fuel off line.
same reasons.
3: then if all that is ok, I do check top end oiling now, if not any top end, the cams will not last very long. they will smoke and seize up in a flash.

this is how its done correctly, ask how.

Aug 20, 2016 | Isuzu Cars & Trucks

1 Answer

2008 cobalt cranks but won't start


If it cranks good but won't start, 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. Also, check for a fuel injector pulse.
Can you check for applicable trouble codes? You need an obd2 code reader, at the least, to check codes.

Nov 29, 2015 | 2008 Chevrolet Cobalt

2 Answers

Will crank but will not start


great post. and symptoms,
no engine option stated so generic answered. and guess gas engine.
so if it dont start, you check spark next.
at each cylinder if #1 is dead. #1 is most easy.
if spark is good, it runs on test fuel (not blown engine)
does it? run for 3 seconds, on test fuel (you spray it?)

the list , easy
  1. check fuses.
  2. crank engine with scan tool attached (any) get DTC errors ?cranking for 5 seconds, sure you do? P03xx errors. bingo!
  3. the ASD fails to close , cranked, ? (fuses mostly)
  4. The ASD relay drops off , while mid cranking? if yes Scan tool told you why in every case. use a scan tool. or guess forever.
  5. ok test fuel works, and no DTCs and ASD hold, seams you lost the fuel pump pressure, check pressure.
http://www.fixkick.com/Jeeps/ASD.html

Mar 15, 2015 | 2005 Jeep Liberty

1 Answer

2006 monte carlo engine cranks but will not start


If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs, if spark everywhere, use a gage and check fuel proper fuel pressure. Check fuel injector pulse.

Check your security system.

Feb 22, 2015 | 2006 Chevrolet Monte Carlo

1 Answer

Why won't my 2006 Chevy cobalt start


if it cranks, check for spark and/or fuel

Oct 04, 2014 | 2006 Chevrolet Cobalt

1 Answer

2006 cobalt.replaed starter relay fuse all lights come on dash ect. fuel going to fuel pump but wont crank over


Are you positive the battery is good? Did you try to jump it ? Make sure all cables are clean and tight. When you say "won't crank over" do you mean the engine doesn't turn at all? If not, I don't know why you think the fuel pump would be the culprit. If it cranks and doesn't start, I don't know why you replaced the starter.

Disconnecting the battery doesn't reset the light. You need a scan tool for that unless you get lucky and fix the problem and go through enough cycles for it to go out on it's own.

Take it to Autozone or Advance or somewhere and have them read the codes. They do it for free for you. (They are hoping you will buy parts there) They can reset the light as well.

Jun 29, 2017 | 2006 Chevrolet Cobalt LS

1 Answer

Why is 06 cobalt only giving 18 mpg


CHANGE AIR FILTER.CHECK TIRES AIR PRESSURE.CLEAN FUEL INJECTORS.CHECK FOR FUEL LEAKS UNDER THE HOOD AROUND ALL FUEL LINES AT THE INTAKE MANIFOLD AND CHECK FOR GAS LEAKS AROUND FUEL TANK WHERE ALL FUEL LINES LOCATED.

Apr 26, 2011 | 2006 Chevrolet Cobalt

1 Answer

Ran out of Gas .Filled Gas Tank car ran till the next day. Tried to start and it would not start???? 2007 Cobolt NEED HELP Rich


Could've burnt up the pump running it dry and filling it up. The cold gas may have damaged the pump when you filled it. Check your fuel pressure to be sure.

Jun 10, 2009 | 2006 Chevrolet Cobalt

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