Electrical or fuel problem?

[Jeep Driver]

6 minutes ago, Moffat007 said:

Ok got it - can you please guide me to the temp sensor?

 

 

Is it the one on top or on the side of the manifold?

 

From the front of the truck the temp sensor is right behind the TB, it has two wires coming out of it, screws into the top of the manifold. 

[Moffat007]

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[Moffat007]

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[Moffat007]

So mine has two - I guess one for the gauge and one for the comp?


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[Jeep Driver]

4 minutes ago, Moffat007 said:

So mine has two - I guess one for the gauge and one for the comp?


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The one for the gauge is a single wire and it's in the back of  the head........NOT the intake. 

 

There is also a intake air temp sensor close by but it's not as crucial.

 

 

Edit......I'm sorry.

 

 

The one on the top is the air temp the one on the side is the coolant temp sensor.........coolant temp is critical.

[ftpiercecracker1]

I'm a bit confused. Are you looking for air or coolant temperature sensor?

 

There are three coolant related "sensors" in the renix engine bay.

 

The one in the driver side of the block half way down is the actual sensor that delivers info to the ECU,  it has two wires.

 

The one at the very far back of the cylinder head on the drivers side is a sender that connects to the gauge, it is a single wire

 

Then there is a thermal switch on the lower drivers side of the radiator. It is two wires and energizes the cooling fan relay if temp exceeds 230° F.

 

 

 

 

In the pictures below the blue arrow is pointing at the temperature SENDER. 

 

What I'm confused about are the items circled in red. Are both of these IAT sensors? (Intake air temperature)

 

Is one possibly for the EGR and the other for the ECU?

 

[Jeep Driver]

50 minutes ago, ftpiercecracker1 said:

I'm a bit confused. Are you looking for air or coolant temperature sensor?

 

There are three coolant related "sensors" in the renix engine bay.

 

The one in the driver side of the block half way down is the actual sensor that delivers info to the ECU,  it has two wires.

 

The one at the very far back of the cylinder head on the drivers side is a sender that connects to the gauge, it is a single wire

 

Then there is a thermal switch on the lower drivers side of the radiator. It is two wires and energizes the cooling fan relay if temp exceeds 230° F.

 

 

 

 

In the pictures below the blue arrow is pointing at the temperature SENDER. 

 

What I'm confused about are the items circled in red. Are both of these IAT sensors? (Intake air temperature)

 

Is one possibly for the EGR and the other for the ECU?

 

Don't be confused. 

 

 

Renix 2.5 has two temp sensors/senders, one in the intake and one in the head.

 

He's looking for the one in the intake- to ECU.

[ftpiercecracker1]

1 hour ago, Jeep Driver said:

Don't be confused. 

 

 

Renix 2.5 has two temp sensors/senders, one in the intake and one in the head.

 

He's looking for the one in the intake- to ECU.

 

Thanks driver, but I still don't understand .

 

The sender in the head, blue arrow, measures coolant temp. Right?

 

There is no coolant in the intake, so both of the sensors circled in red must be measuring air temp.

 

But what are they connected to? What I mean is, one presumably provides info for the ECU, but what about the other. And which one is which?

 

Thanks,

Sorry, didnt mean to highkack your thread OP. 

 

 

[Jeep Driver]

1 hour ago, ftpiercecracker1 said:

 

Thanks driver, but I still don't understand .

 

The sender in the head, blue arrow, measures coolant temp. Right?

 

There is no coolant in the intake, so both of the sensors circled in red must be measuring air temp.

 

But what are they connected to? What I mean is, one presumably provides info for the ECU, but what about the other. And which one is which?

 

Thanks,

Sorry, didnt mean to highkack your thread OP. 

 

 

There is coolant in the intake......it's a heated intake. 

[ftpiercecracker1]

4 hours ago, Jeep Driver said:

There is coolant in the intake......it's a heated intake. 

 

 

Whaaaaaaaaat??

 

 

But . . . Why? Emissions? don't you want your intake charge to be a cold as possible?

 

I imagine the intake must have passages that mate up with the cylinder head then.

 

[Moffat007]

Big thanks to everyone, problem solved . I replaced all the sensors mentioned above - but the problem was the autozone fuel pump all along - I bought a new one from NAPA and now she’s running like a champ !


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[Moffat007]

There is coolant in the intake......it's a heated intake. 

That one on the side wàs the coolant temp sensor when I screwed it out, coolant leaked out.


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