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Assistance with no start issue...
Traveling through town, my 90 XJ died while in flight. It cra nks snd cranks so i think it must be out of fuel as my fuel guage is very inaccurate. So i push it down the street to the gas station and put $20 worth of fuel in it. I cycle the ignition a few times to pressurize the system. Still no start...only cranks. I also don't hear the fuel pump humming or making any noise.
I buy a can of ether and spray it into the intake tube. Engine fires, runs a second or two then stumbles and dies. Experience tells me this is likely a bad fuel pump. Anything else it could be like a fuse or relay? Does anyone think it could be anything other than a fuel issue based on what I'm describing? |
Originally Posted by 90_cherokee
(Post 2159963)
Traveling through town, my 90 XJ died while in flight. It cra nks snd cranks so i think it must be out of fuel as my fuel guage is very inaccurate. So i push it down the street to the gas station and put $20 worth of fuel in it. I cycle the ignition a few times to pressurize the system. Still no start...only cranks. I also don't hear the fuel pump humming or making any noise.
I buy a can of ether and spray it into the intake tube. Engine fires, runs a second or two then stumbles and dies. Experience tells me this is likely a bad fuel pump. Anything else it could be like a fuse or relay? Does anyone think it could be anything other than a fuel issue based on what I'm describing? |
If it starts with starting fluid then you absolutely have good spark but have no fuel delivery.
I don't recall how the control electronics is set up for the fuel pump on the Renix 4.0 but you should verify all fuses and relays. If they're good, then you are likely going to have to replace your fuel pump. Don't buy an Airtex. |
There's a ceramic resistor in the inner fender by the air cleaner. Bat voltage goes in the front (for a couple seconds, then when it starts), and the rear goes straight to the pump. With a meter or a test light (or something), you can check for current there. It's the other end of the wire Freedgr mentioned I think. The fuel pump relay is the second one back of those four. :thumbsup:
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Originally Posted by tjwalker
(Post 2160143)
If it starts with starting fluid then you absolutely have good spark but have no fuel delivery.
I don't recall how the control electronics is set up for the fuel pump on the Renix 4.0 but you should verify all fuses and relays. If they're good, then you are likely going to have to replace your fuel pump. Don't buy an Airtex. Just don't buy an Airtex pump for a late model with the pump assembly on top of the tank. |
Originally Posted by tjwalker
If it starts with starting fluid then you absolutely have good spark but have no fuel delivery.
I don't recall how the control electronics is set up for the fuel pump on the Renix 4.0 but you should verify all fuses and relays. If they're good, then you are likely going to have to replace your fuel pump. Don't buy an Airtex. |
Originally Posted by pajuis
(Post 2161083)
What's wrong with Airtex?
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Originally Posted by lowrange2
(Post 2161057)
There's nothing wrong with the Airtex pumps for earlier model Jeeps.
Here is one of many threads. https://www.cherokeeforum.com/f59/ai...-96674/index2/ Stay away from them IMHO. Sure some guys are using them and not having issues, but I've personally had a number of them go belly up in short order or worse yet, not even work out of the box. Because of that, I won't install them or recommend them. Many parts stores carry the Airtex because of their "attractive" price. But don't let price be the only criteria for you. Spend a little more on better options including Bosch (my 1st choice) and Carter. |
I bought just the pump worked less than 10 minutes returned it . Bought plug and play airtech assembly been about a year no issues .
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Originally Posted by tjwalker
Disagree. But don't take my word for it. A quick search of the web and other Jeep forums will find evidence of plenty of unhappy Airtex fuel pump owners for all years of the XJ. Stay away from them IMHO. Sure some guys are using them and not having issues, but I've personally had a number of them go belly up in short order or worse yet, not even work out of the box. Because of that, I won't install them or recommend them. Many parts stores carry the Airtex because of their "attractive" price. But don't let price be the only criteria for you. Spend a little more on better options including Bosch and Carter. |
So I have run a jumper between the connectors for the ballast resistor ss a bypasd and it still only cranks. I also ran a jumper between terminal 30 and 87 on the fuel pump relay, turned the key and listened for the fuel pump running...nothing...safe to say fuel pump is toast?
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It does sound like it, if you put power to that rear wire off the ballast and hear nothing. Like freedgr mentioned, you might want to see that it is indeed making it to the pump, long wire there. Maybe the longest? Pumps do fail, I've been through a few.
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