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-   -   97 TJ taking a long time to start (http://www.wranglerforum.com/f210/97-tj-taking-a-long-time-to-start-254219.html)

leebrewer3 07-07-2013 06:54 PM

97 TJ taking a long time to start
 
Hello,


This past week I installed a rear main seal, clutch, SYE, CV driveshaft, valve cover gasket, plugs, wires, rotor, distributor cap and belt. My TJ has 140K on it and is taking a long time (in my opinion) to start (like 5 sec counting 1 miss, 2 miss etc...). Is this a timing issue? Fuel pump? Once cranked it runs smooth. Any suggestions appreciated.

Thanks

surferbear 07-07-2013 06:59 PM

Ihave the same issue with my '97 TJ. I'll be watching this tread to see any answers. Good question.

Robertsk1 07-08-2013 09:01 AM

You most likely have a leaky anti-drainback valve in your fuel pressure regulator. This valve prevents gas from running back through the system into your gas system when the jeep is not running. You'll notice that if you start your jeep 5-10 after you turned it off, it'll fire up just fine, and that's because the fuel hasn't had time to fall back into the tank. Try turning the key to the ON position then the OFF position 4-5 times to get the fuel pump to cycle, then try to fire it up. If the jeep fires right over, this will confirm it is in fact this valve. On our 97's, this valve is sold seperately, (60 bucks on ebay I believe) and sits on top of the fuel pump assembly. It might be a good idea to replace the fuel pressure regulator and the fuel pump while you have the tank down.

Here's a link to the part
New Standard SMP Fuel Filter Pressure Regulator Replacement | eBay

Hope this helps!

leebrewer3 07-09-2013 12:51 AM

Quote:

Originally Posted by Robertsk1 (Post 3937888)
You most likely have a leaky anti-drainback valve in your fuel pressure regulator. This valve prevents gas from running back through the system into your gas system when the jeep is not running. You'll notice that if you start your jeep 5-10 after you turned it off, it'll fire up just fine, and that's because the fuel hasn't had time to fall back into the tank. Try turning the key to the ON position then the OFF position 4-5 times to get the fuel pump to cycle, then try to fire it up. If the jeep fires right over, this will confirm it is in fact this valve. On our 97's, this valve is sold seperately, (60 bucks on ebay I believe) and sits on top of the fuel pump assembly. It might be a good idea to replace the fuel pressure regulator and the fuel pump while you have the tank down.

Here's a link to the part
New Standard SMP Fuel Filter Pressure Regulator Replacement | eBay

Hope this helps!

That is exactly what it does. I can turn it off and restart within 5 min and it will crank like normal. I will do the ignition cycle test tomorrow and confirm but that sounds like it may be the issue. Thanks for your input!

BigDeaner 07-09-2013 08:15 AM

Check your battery at AutoZone. They'll do it for free and you can rule it out immediately. I was having a similar issue and i was all ready to drop my tank and throw a new pump in. Turned out it was a shot battery.

leebrewer3 07-09-2013 11:42 AM

Quote:

Originally Posted by Robertsk1 (Post 3937888)
You most likely have a leaky anti-drainback valve in your fuel pressure regulator. This valve prevents gas from running back through the system into your gas system when the jeep is not running. You'll notice that if you start your jeep 5-10 after you turned it off, it'll fire up just fine, and that's because the fuel hasn't had time to fall back into the tank. Try turning the key to the ON position then the OFF position 4-5 times to get the fuel pump to cycle, then try to fire it up. If the jeep fires right over, this will confirm it is in fact this valve. On our 97's, this valve is sold seperately, (60 bucks on ebay I believe) and sits on top of the fuel pump assembly. It might be a good idea to replace the fuel pressure regulator and the fuel pump while you have the tank down.

Here's a link to the part
New Standard SMP Fuel Filter Pressure Regulator Replacement | eBay

Hope this helps!

I did the cycle test this morning and it started normal. This pretty much confirms the bad valve. Thanks for the help!. As far as the battery goes, the vehicle turns over normal, plus while I was doing all the mechanical work to it I put it on my charger and completely charged it on a slow 2 amp charge. Battery is fine, but thanks for the input.

Robertsk1 07-09-2013 11:51 AM

Quote:

Originally Posted by leebrewer3 (Post 3942248)
I did the cycle test this morning and it started normal. This pretty much confirms the bad valve. Thanks for the help!. As far as the battery goes, the vehicle turns over normal, plus while I was doing all the mechanical work to it I put it on my charger and completely charged it on a slow 2 amp charge. Battery is fine, but thanks for the input.


Glad I could help. I currently have the same problem, but I'm the kind of guy who likes to nip things in the butt so if I'm going to drop the tank to fix the problem, I'm gonna replace the fuel pump while I'm at it. I just have to find some motivation to do it and get the parts. I already have a bunch of stuf fon the to-do list that's more important. Haha. :whistling:

Good luck!


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