throttle body vac line to ecu

[Dom U]

Alright guys so my truck was running like $#!& total $#!&. found the hard plastic vacline from the throttle body to ecu was cracked in half. From what iv found on here they no longer make this piece. Any suggestions on what I should do?

[reubj]

year?  engine?

[Dom U]

My apologies. 88 4.0 auto 4wd

[ParadiseMJ]

OK, so there is no vacuum line to the ECU.  The ECU is the computer.  The MAP sensor is mounted to the firewall, with a vac line to the throttle body.

 

It is true, I've heard, that the line itself is no longer available except maybe on a shelf as NOS (new, old stock).  You can either repair the line with a piece of soft line slid over the two broken ends...to connect the two ends...or you can look at a junkyard (but from what I've found most of them are broken too) OR you can take a piece of the broken line to NAPA where there is actually a parts guy/gal that knows how to solve problems, and find some matching size bulk vacuum line of the right length (AutoZone will need to know the year, engine, 4WD or 2WD, the trim package etc so they can look it up on their computer...and it won't be there).  Bulk line is cheap, save the fittings on either end of the line and put it all back together.

[Dom U]

Thanks ill head over to Napa on Monday and see what they might have. Idk why I said ecu I must of had it in my head lol. Thanks.

 

The gromet that's on the throttle body that the line goes into is very lose and I can easily pull it out is this normal or should I gasket seal it?

 

OK, so there is no vacuum line to the ECU. The ECU is the computer. The MAP sensor is mounted to the firewall, with a vac line to the throttle body.

 

It is true, I've heard, that the line itself is no longer available except maybe on a shelf as NOS (new, old stock). You can either repair the line with a piece of soft line slid over the two broken ends...to connect the two ends...or you can look at a junkyard (but from what I've found most of them are broken too) OR you can take a piece of the broken line to NAPA where there is actually a parts guy/gal that knows how to solve problems, and find some matching size bulk vacuum line of the right length (AutoZone will need to know the year, engine, 4WD or 2WD, the trim package etc so they can look it up on their computer...and it won't be there). Bulk line is cheap, save the fittings on either end of the line and put it all back together.

[Jeep Driver]

Brake line makes a wonderful vacuum line.

 

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[Dom U]

Brake line makes a wonderful vacuum line.

 

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Is that a HO?

[Rockfrog]

Nope, that's a 2.5L

 

And I agree, replace it with 3/16" brakeline ... most of my lines have been replaced with it on my 88's 4.0L. My CCV l7nes are 3/8" brakeline as well.

Works great and fits the fittings better, with no worries about heat melting them.

[Crash]

What I did with mine, since there was some plastic left. I used a length of rubber vacuum line, and used left over bits of the plastic "hardline" to connect to the TB and the MAP sensor.

[cruiser54]

That line is no longer available. You have to get creative.

 

While using rubber line to repair the broken piece will get you home, the rest of the plastic line is still prone to cracking in the future. 

[Rockfrog]

Seriously ... steel brakeline is the best overall fix IMO.

It won't crack, won't melt, fits the stock rubber elbows better, is easy to bend, and will likely outlast the truck.

This was an older picture, the greenish lines are 3/16" brakeline.

When i replaced the top end with newer stuff i used more brakeline as well. Pretty m6ch all of my vacuum lines have been replaced with eqivalent sized brakelines at this point.