Quantcast




All times are UTC - 6 hours [ DST ]




Ask A Question Reply    Go to page 1, 2  Next
Author Message
 

contributions: 7
I changed the fuelpump and it started, but when i replaced the tank into the car it wouldn't start, only cranks... fuelpump is coming on and is reading 47psi as specified at autozone... but will not start. Theft system light is NOT flashing no check engine light... no kinked fuel lines and all good electrical connections. what is my problem?


Share on FacebookShare on DiggShare on DeliciousShare on TechnoratiShare on TumblrShare on Google+
   
Reply with quote  
* Search   
 
User avatar

contributions: 1918
Images: 37
Location: Oregon
have you checked for spark and injector pulse while cranking?


   
Reply with quote  
 

contributions: 7
It started once i rev to 3000rpm it was smootth even idle back down and stayed smooth.... i put the tank back in the car and it wouldnt start back up... i even checked for bad connection and kinks in the fuel lines... everything looks good


   
Reply with quote  
 
User avatar

contributions: 1918
Images: 37
Location: Oregon
that's kind of strange. if the car ran with the fuel tank down and then you bolt it up but you still get 47 psi from the pump, there's nothing else a fuel pump does. If you are getting power to the pump and the pump pressurizes the fuel rail to 47 psi that's it. it's working. you could release the rail pressure and cycle the key to verify that you have full pressure again but if it cycles up to spec it shouldn't be a fuel pump problem. Have you checked all the wiring around the tank to make sure no wires are pinched anywhere? or tried lowering the tank back down again to see it starts then?

have you checked to see if any fuses are blown?

Verify that you have ignition spark and injector pulse while cranking. that should be the next piece of the puzzle to look at. if you don't have injector pulse but do have spark I would look at the security system even if the light does not come on. if you have no spark and no injector pulse I would look at the crank sensor, pcm or a blown fuse


   
Reply with quote  
 

contributions: 7
What are yalls thoughts on the idle air control valve? Or maybe the throttle position sensor?


   
Reply with quote  
 
User avatar

contributions: 1918
Images: 37
Location: Oregon
if you want to see what your iac or tps are doing you should hook up a scanner and see what they are telling the computer. those things don't usually cause a no start. If the tps was reading full throttle it would be in clear flood mode but usually tps go out in low readings not high. (but anything is possible. The iac could be bypassed by using the throttle with you foot to open it a little while cranking in case it was stuck closed.

have you verified spark and injector pulse yet?


   
Reply with quote  
 

contributions: 7
Haven't worked on it for a couple days I've been told by several different people to try the crank pos sensor


   
Reply with quote  
 

contributions: 7
Ok so it is getting spark on the plugs.... as i can't get to the fuel injectors without removing the upper intake, how would i check the injectors?


   
Reply with quote  
Ask A Question Reply    Go to page 1, 2  Next


   Similar Topics   Author   Replies   Views   Most Recent 
New Articles View the first 1999 suburban 5.7 Starts intermittently Cranks few second

in Chevy Suburban

Ndrivers1988

3

384

Sat Jul 23, 2016 12:19 am

carriedi View the latest

New Articles View the first Attachment(s) Fuse #15 functions not working with a good fuse

in Chevy Venture Van

txcarmel

4

662

Wed Jun 25, 2014 5:00 pm

txcarmel View the latest

New Articles View the first Tahoe oil gauge pressure at zero

in Chevy Tahoe

georgenikkichevytahoe

1

504

Tue Mar 17, 2015 10:22 am

carriedi View the latest

New Articles View the first Re: Chevy malibu beeping behind dash

in Chevy Cars

Lbrice56

2

254

Tue Nov 15, 2016 8:39 pm

Lbrice56 View the latest

New Articles View the first 2000 Malibu locked radio

in Chevy Cars

tressdenn

2

1093

Wed Jul 30, 2014 4:46 pm

butchkaz View the latest

New Articles View the first Attachment(s) 2003 malibu no forward gear

in Chevy Cars

t0ddsw0r1d

4

1236

Mon Jun 16, 2014 12:26 pm

t0ddsw0r1d View the latest

New Articles View the first 2006 Chevy Malibu Maxx SS 3.9L V6

in Chevy Cars

tsc864

2

1195

Sun Nov 23, 2014 12:13 pm

tsc864 View the latest


All times are UTC - 6 hours [ DST ]



Search for:
Jump to:  
Contact Us