Cranks but wont start LT4

[captainrags]

I know it an old one but, just replaced the top radiator suport and now she just wont start cranks good and then smell of alot of fuel dident touch distribitor check and double checked all my work this has never hapened before any help would be apreciated, 1996 LT4.
Ray


:confused ;help

 

[Hib Halverson]

Have you read the troubleshooting information in the 6E (engine controls) section in the service manual on "Cranks but won't Run?".

 

[captainrags]

Have you read the troubleshooting information in the 6E (engine controls) section in the service manual on "Cranks but won't Run?".

Thanks Hib
checking now and work at it tomorrow. I get myself lost in thoes Manuals from time to time.
Ive been messing with some evap valves
Cheers
Ray


:duh

 

[captainrags]

Help

This wont start is driving me crazy check and check about all I can do with my limited knoledge.
I have service eng soon light but no codes except second air error I will replace the small tubes tomorrow in that area.
this started after replacing top radiator suport but have been having trouble with purging manual hasent helped and I get confused with all the eng control stuff.
Would appreciate any help that I can use



;help

 

[Hib Halverson]

This wont start is driving me crazy check and check about all I can do with my limited knoledge.
I have service eng soon light but no codes except second air error I will replace the small tubes tomorrow in that area.
this started after replacing top radiator suport but have been having trouble with purging manual hasent helped and I get confused with all the eng control stuff.
Would appreciate any help that I can use
;help

If you're being "driven crazy" and you have limited knowledge the way to sanity and comprehension is the Factory Service Manual. Best place to look is Section 6E's troubleshooting page titled "Cranks but Won't Run".

If you read the FSM and you are still confused, I recommend you search for a dealer or an independent Corvette specialist to repair the car.

 

[vetteboy86]

The motor turns over and never catches? If this is the case, you need to systematically determine if there is a fuel or spark issue.

Have you performed any fuel system checks? Do you have a service manual?

You can view this article. To give you an idea. http://www.corvetteactioncenter.com/tech/howto/idx.php/0/016/article/

 

[foosy]

foosy

make sure your battery is fully charged

 

[vetteoz]

, you need to systematically determine if there is a fuel or spark issue.

Lt1 No Start Diagnostic - Mainstreamtopics - Your General Forum

 

[John Robinson]

If I understand you right you replaced the radiator support and now the car will turn over but not start and you have the smell of fuel when it turns over.

It would seem to me that you have left a ground wire off or did not get it tightened down enough to make ground. Or maybe you crossed the connections on a couple of sensors. You need to systematically recheck everything you did or touched with that support replacement. I am guessing that you do not have a problem with any of the sensors but rather you have created your condition with a loose wire somewhere. As suggested if you read the FSM for a no start condition almost every check is for good grounds on each of the sensors.

I don't know on the LT4 but on my LT1 the Evap system is very close to the radiator. Again if you had to disturb any of the hoses etc. and did not get them tightened down you will get the smell of fuel.

Finally check the fuses especially the one on the Evap motor. It may be just something as simple as a fuse that got power spiked and blown when you reconnected the wires.

 

[captainrags]

I’d like to thank all who helped me out with my “cranks but won’t start”.
Today after several days of tinkering I finally won. If anybody interested this was the scenario I had been chasing a “non purge” issue and while waiting for some parts decided to replace the top radiator support as it was cracked in several places due to somebody hitting the passenger’s side front, cracking the paint work and moving a few bits around the replacement went well difficult but was finally accomplished after about 4 -5 hours many cuts blood and cursing due to my plavix intake.
The engine then would not start, so thru the system I went, following the manual the best I could fuel press was good and everything felt good it did fire up and I immediately attempted to bleed the water system at the thermostat, but dropped the plug and water leaked and eng stopped figuring it stalled. I dried off everything waited a day looked into the purge system again as this is where I still suspected the problem was, I also used compressed air to clean the area wd40 etc. It would not start this was when it posted help thinking it was the purge system and other issues ii replaced several vac lines check spark fuel, coil ect again following the start procedure NADA.
Let it sit for the new year decided to get a bit more serious today removed all low voltage wires from the distributor air intake throttle body eng the purge system pulled the steering pump reservoir away so I could get to bottom of distributor, ran hair dried for 3 hours on area and wires removed the small rubber inserts on the back of all wire connectors and heated and air blew them as now thinking there was a water issue more so than an purge system problem as I did find very small traces of liquid not sure if it was water or oil, I used cotton buds as well as rags and heat.
Put it all back together held my breath and bang started on the first hit lots of smoke due to the exhaust being somewhat full of whatever after all the cranking. I don’t have the purge 441 anymore but I will play with that when and if it returns, however the car does seem to have a bit more power.
I would like to thank all for the help I was truly appreciated even the comments READ THE MANUAL constantly you were right!! as an ex mechanic of 30 years yes times have changed immensely but this hasn’t stopped me from tinkering again but did learn a good lesson real the book!!!
Ray