Back again in need of help with the good ole Lexus. It’s a 1996

a few weeks ago my car got a CEL for running lean and I know it wasn’t my fuel pump as that was replaced shortly before I bought the Lexus. I cleaned my mass airflow sensor and replaced my fuel filter. Shortly after I heard a whining sound coming from my vacuum lines so I went ahead and replaced all of the lines that I saw on the little bit of a vacuum diagram I could find.

problem now is that after replacing the lines I still have leaks. I got lines from my local orileys along with new screw clamps. After I put them on I still have a leak. When I still had a leak with the new clamps and lines I thought it wouldn’t hurt to put some silicon on the nubs where the lines go on to help make sure that there was a good seal and then some silicon on top of that but I still have leaks. So I went and got some more line because I thought I over tightened it but nope still have leaks.

also I might have knocked off one of the nubs that the line goes on and I’ll put a picture if anyone know what part it is



The nub on the right is broken but I’ve jerry rigged it so it is ok and right so nothing leaks from there at least


If anyone can help out it would be greatly appreciated as the vacuum leaks are one of if not the main cause to my starting issue and a few more things

 

Those generic hoses are trash and so are the screw clamps. If it was me I'd hit an auto wreckers don't know if that is an option for you.

 

​Toyota/Lexus use high quality metric vacuum lines and constant tension clamps
O'Reillys offers neither metric vaccuum lines, nor constant tension clamps, hence your lab experiment.

First, no one on this forum knows Jerry.... so replace any broken parts (vacuum fittings). Locate a donor vehicle and acquire all original vacuum lines and clamps. Take pictures.

Second, see if the dealer offers the correct vacuum lines, either individually, or in bulk. Ditch the worm gear clamps and purchase new constant tension clamps from dealer.
If vacuum lines are discontinued from dealer, use McMaster-Carr metric SILICONE tubing.

Third, do not buy replacement parts from big box auto parts stores expecting them to last or work correctly.

Fourth, seek help.from someone experienced with your 1LUZ-FE engine.

 

I do. Funny thing.....the plumber that did my kitchen sink was actually named "Jerry" and the pipes are leaking.

 

Yoda's suggestion is Some fittings can be repaired with replacement fittings or metal tube and epoxied in. The clamps are readily available from Toyota (Don't go to Lexus) for $.56-$5+ depending on size. Most the factory vacuum lines are still available and for the specific ones that are molded to shape those will be bought from Lexus or your favorite Lexus parts dealer.

Be gentle removing the stiff vacuum lines from their plastic mounts. Enough of us have sheered them off and have had to fix them. Hose pliers and hose picks are helpful tools to have. Apply some soapy water on those areas to help slide them off. Hard hoses will be easier cut off just past the nipple. Be careful when removing that remaining hose on the nipple to not score the plastic or metal. Any fluid filled lines that have a significant scratch/gouge may leak when pressurized.

 

My advise is compare between Lexus and Toyota.... Once you have your part number call your local dealership and compare prices at the counter and online via the online order tool and call them to price check on the phone... I got a gasket for my SC400 for 1.60 at the counter at Lexus and Toyota wanted $5 at the counter... online Toyota had it for .98 cents and Lexus online had it for the same counter price of $1.60....

 

When my vacuum tube leaked, I took pictures and sent to Lexus online store to ask for part number and purchased them.

 

how much did they charge you? i went to my local lexus dealership and for the parts i needed it came out to $312

 

What and how many hoses did you get? They can be $ so depends which ones. A handful of those adds up so it isn't shocking what it may be to spend on them.

 

Get part numbers and do compare shopping online and ebay stores(some are Lexus dealers). Sometime you can find good price ones.
My local Lexus dealers charge double compared to online stores.

 

I didn't end up buying them as I don't have $312 to dish out but it was for all the lines that I circled in the picture. If i had to guess it would be 2-3 feet maybe and 6 clamps

 

That was my next step. The guy working was kind enough to tell me the part numbers and even said try Toyota and see if they can cross reference the part numbers because even he wouldn't pay for that

 

You might want to build a smoke machine(e.g ) to find out where it leaks.

 

I've found the leaking lines i just need to go to a toyota dealership and see what they charge for the lines or of they could cross match them. Or if anyone knows the size of the hoses i could order them online

 

How did you clean the MAF sensor? I have heard claims that it is very sensitive and breaks with little provocation. Thanks