Novak Conversions Jeep Wrangler TJ engine mounts

Mistake and now TJ will not turnover

L

LPITT56

New Member
Original poster
Joined
Jul 13, 2024
Messages
5
Location
36117
My son has a 2000 Jeep Wrangler TJ that was turning over good but just would not crank. I discovered a fuel line that I believe had been chew in two by a squarl and replaced that line but it still would not fire off. (turned over good but would not crank). I left to go buy some starter fluid and while I was gone my son thought he could prime the new fuel line by pouring gas directly into the carborator (with the jeep off of course). When I got back he told me what he had done and I tried to crank it and now it is locked tight and will not turn over. It will no even attempt to turn over.

Need help! Any suggestion on what to do?
 
I agree with bucky, pull the plugs and turn the crank with a wrench and see if the motor is free.
 
bucky said:
How much gas did he pour in? May be hydro locked. Pull plugs and see. Careful, if there is gas in the cylinders it will spray out and and spark will light it up. Ask me how I know this will happen.
Click to expand...

Thanks for the quick reply! I believe you are right about hydro locked... he said it poured about 20 oz or more of gas directly into the carborator. Sounds like you have experienced this before, so when you say pull the plugs carefully what do you recommend? Just slowly back out the plugs a thread or so at a time and let a little seep out (if full of fuel)? The last thing I want it to get burned!! Any suggestions of the safe way to do this would be greatly appreciated!
 
Mac57 said:
What engine is in this 2000 TJ? Stock would have been fuel injected with a throttle body. No carburetor.
Click to expand...

I'm guessing he means the throttle body, but it took way too long for somebody to correct that.

There may be a better way, but I would keep the air intke tube off the throttle body and prop the butterfly open and wait for the gas to evaporate. In the meanwhile, checking the fuel pressure at the rail would be your best diagnostic step. Either borrow a gauge from the parts store or just push a sharp rock into the schraeder valve to check it redneck style.
 
  • Like
Reactions: Tob and lBasket
hear said:
I'm guessing he means the throttle body, but it took way too long for somebody to correct that.

There may be a better way, but I would keep the air intke tube off the throttle body and prop the butterfly open and wait for the gas to evaporate. In the meanwhile, checking the fuel pressure at the rail would be your best diagnostic step. Either borrow a gauge from the parts store or just push a sharp rock into the schraeder valve to check it redneck style.
Click to expand...

Yes, for clarification the gas was poured intot the throttle body (sorry about that).
 
Do what hear says above to try get the added gas evaporated out. 20 ounces, (almost 2 full beers!), is a lot to dump down the throttle body. You may even have to pull the plugs and rotate the engine BY HAND to eject it out of the plug holes. Once you have that done, again. as hear says, proceed to test for fuel pressure at the rail. Report back and we can help you further from there.
 
  • Like
Reactions: hear
Somebody else will know better than me but does this warrant an oil change for him? That's a lot of gas that's going to, I would think, mostly leak past the rings before it evaporates directly to atmosphere.
 
  • Like
Reactions: Lemmy
Be so careful- had a friend get burned so bad this way.

Keep us posted.
 
20oz is enough to fill a cylinder with an open intake valve. Disconnect the battery, remove the plugs and place a stick in the cylinders to see if there is any fluid gas in them. If there is visible gas it needs to be removed. If gas got in the cylinders there is a good chance it leaked pass the rings and into the oil. Cheap insurance to change the oil when everything is cleaned out of the cylinders. Your son has hopefully learned a lesson. Before I replaced the fuel pump on my YJ I would need to “prime” the carb with gas. I pour some gas in a tin can and use that to meter gas into the carb.
 
  • Like
Reactions: Andy-WhiteTJ
Do this outside of the garage. Pull the plugs all the way out. Put a socket wrench on the bolt in the center of the crank and turn the engine over a couple of times to get the fuel out. Do not turn the key and try to user the starter. It may ignite all the fumes.

Change the oil because the fuel will go past the piston rings.

Put the plugs back in and you are now back to where you started.
 
Sorry so long in replying to this thread. I have been out of town but now back on the Jeep again. Leaving the throttle body open for 6 days evaporated all the fuel from the cylinders and it now turns over fine. Just as a precaution I changed the plugs and oil. I still will not fire off... not even when you spray starter fuel. Could it be plug wires? I have not changed those...
 
  • Like
Reactions: macleanflood and JMT
With a bad plug wire or two, it should still try to fire, even if it can't get fully running. If it's not sounding like it's firing at all, the problem is probably deeper in the ignition system.

Do you get power to the coil, for a couple of seconds right after the key is turned on? The PCM supplies power to the hot side of the coil via the ASD relay. And the PCM toggles the ground side of the coil to drive spark. But it will stop both signals if it doesn't receive camshaft and crankshaft sensor signals.

Sorry, there are lots of things to check at this point.
 
LPITT56 said:
Sorry so long in replying to this thread. I have been out of town but now back on the Jeep again. Leaving the throttle body open for 6 days evaporated all the fuel from the cylinders and it now turns over fine. Just as a precaution I changed the plugs and oil. I still will not fire off... not even when you spray starter fuel. Could it be plug wires? I have not changed those...
Click to expand...

I've come across several cracked ignition coils on the 2.5, it's tucked in behind the alt on the block. may want to check to see if there is power at the coil. Test procedure is in the Service manual that is free to download from the Resource section.

What were your initial symptoms when it first would not start.
 

Similar threads

C
TJ cranks but won't start
Replies
7
Views
346
TJ General Discussion
ItchyDong
ItchyDong
Cookie
Fuel pump or crank shaft sensor?
Replies
7
Views
589
TJ General Discussion
macleanflood
macleanflood
Aidynl
Starts but doesn’t crank
Replies
6
Views
393
TJ General Discussion
Aidynl
Aidynl
B
No start slow crank
Replies
1
Views
142
TJ General Discussion
JKP
JKP
E
97 4.0 5-speed won't crank (help in Austin?)
Replies
12
Views
292
TJ General Discussion
EricP
E
Novak Conversions Jeep Wrangler TJ engine mounts
Top Bottom