post AIT
Safety Car
Joined: Apr 2004
Posts: 3,932
Likes: 8
From: Hayward California
Nick,
I know you know this man but.. you have an intermittent issue and the only way to deal w/ that is to know what of what you've got is good.
Confirm all wiring/connections are good. Even a cold solder, flakey crimp-on or bad ground can work some times. Then there's, as we talked about, obstruction.. incoming and pressure side needs to be checked. Hell, if you could borrow components to confirm whether things improve that would make things go alot quicker.
I know it's a PIA but I just don't want to see you replacing the whole system and having the same problem happening.
Good luck
I know you know this man but.. you have an intermittent issue and the only way to deal w/ that is to know what of what you've got is good.
Confirm all wiring/connections are good. Even a cold solder, flakey crimp-on or bad ground can work some times. Then there's, as we talked about, obstruction.. incoming and pressure side needs to be checked. Hell, if you could borrow components to confirm whether things improve that would make things go alot quicker.
I know it's a PIA but I just don't want to see you replacing the whole system and having the same problem happening.
Good luck
Team Owner
Joined: Mar 2003
Posts: 96,496
Likes: 82
St. Jude Donor '03 through '17
Originally Posted by AVB
Nick,
I know you know this man but.. you have an intermittent issue and the only way to deal w/ that is to know what of what you've got is good.
Confirm all wiring/connections are good. Even a cold solder, flakey crimp-on or bad ground can work some times. Then there's, as we talked about, obstruction.. incoming and pressure side needs to be checked. Hell, if you could borrow components to confirm whether things improve that would make things go alot quicker.
I know it's a PIA but I just don't want to see you replacing the whole system and having the same problem happening.
Good luck
I know you know this man but.. you have an intermittent issue and the only way to deal w/ that is to know what of what you've got is good.
Confirm all wiring/connections are good. Even a cold solder, flakey crimp-on or bad ground can work some times. Then there's, as we talked about, obstruction.. incoming and pressure side needs to be checked. Hell, if you could borrow components to confirm whether things improve that would make things go alot quicker.
I know it's a PIA but I just don't want to see you replacing the whole system and having the same problem happening.
Good luck
Nick, just like I told you to do, check one item at a time first starting with all your connections.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,862
Likes: 85
From: PA
St. Jude Donor '08
Originally Posted by AVB
Nick,
I know you know this man but.. you have an intermittent issue and the only way to deal w/ that is to know what of what you've got is good.
Confirm all wiring/connections are good. Even a cold solder, flakey crimp-on or bad ground can work some times. Then there's, as we talked about, obstruction.. incoming and pressure side needs to be checked. Hell, if you could borrow components to confirm whether things improve that would make things go alot quicker.
I know it's a PIA but I just don't want to see you replacing the whole system and having the same problem happening.
Good luck
I know you know this man but.. you have an intermittent issue and the only way to deal w/ that is to know what of what you've got is good.
Confirm all wiring/connections are good. Even a cold solder, flakey crimp-on or bad ground can work some times. Then there's, as we talked about, obstruction.. incoming and pressure side needs to be checked. Hell, if you could borrow components to confirm whether things improve that would make things go alot quicker.
I know it's a PIA but I just don't want to see you replacing the whole system and having the same problem happening.
Good luck
arnel and jay,
i will start w/connections. if all checks out i will put gauge on it. if that checks out then i will reroute lines in the event that they maybe vapor lockin. actually the fisrt thing ill do is use my lazer temp. gun to see if the line is seeing 150* i dont think its vapor lockin as every time that i have hit the test button i have seen my ar drop. this is no matter how hot/heatsoak the engine bay has gotten.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,862
Likes: 85
From: PA
St. Jude Donor '08
Originally Posted by Earl H
Recent 1/4 mile runs (based on EFILive Logs):
Ambient at ~ 75-77d
Starting IAT's (immediately after burnout): 90d
Endo of the pass: 57d
Ambient at ~ 75-77d
Starting IAT's (immediately after burnout): 90d
Endo of the pass: 57d
wow.....i thought my car was working on the first run....66 being ended 8X
Last edited by NICK YOSKIN; Aug 23, 2006 at 05:07 PM.
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Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
I'm really surprised you guys like spraying the IAT sensor. I found that to be problematic and inconsistent from a tuning perspective. The readings of a wet sensor just make you think you have really good IATs. Not a good approach IMHO.
FWIW, I would usually see 20-30* rise in IAT by the end of the 1/4 mile with a stock dry sensor. The stock sensor pretty much sucks from a response perspective and I recently ordered a replacement that is suppose to work much better.
FWIW, I would usually see 20-30* rise in IAT by the end of the 1/4 mile with a stock dry sensor. The stock sensor pretty much sucks from a response perspective and I recently ordered a replacement that is suppose to work much better.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,862
Likes: 85
From: PA
St. Jude Donor '08
well here is the deal.
i hooked up a home made pressure gauge using a mechanical boost gauge w/regulator, some l brass fitting and some vacuum lines.
i applied compressed air into the regulator and from there it went into the map sensor that controlls the pump. the gauge read 4 psi nothing 8 nothing 10 nothing(held it there for over 10 seconds) then 15 psi at which it started discharging meth.
well with this there is no doubt that it isnt a bad connection or vapor lock.
bad brain or pump, i am betting bad pump.
i hooked up a home made pressure gauge using a mechanical boost gauge w/regulator, some l brass fitting and some vacuum lines.
i applied compressed air into the regulator and from there it went into the map sensor that controlls the pump. the gauge read 4 psi nothing 8 nothing 10 nothing(held it there for over 10 seconds) then 15 psi at which it started discharging meth.
well with this there is no doubt that it isnt a bad connection or vapor lock.
bad brain or pump, i am betting bad pump.
Team Owner
Joined: Mar 2003
Posts: 96,496
Likes: 82
St. Jude Donor '03 through '17
You need a new pump, I swear it as I heard the whole thing over the phone, it's not a vapor lock issue.
Get Julio on the phone and make him belly up to the bar with a new pump instead of rebuilding yours for a 3rd. time!
Get Julio on the phone and make him belly up to the bar with a new pump instead of rebuilding yours for a 3rd. time!
Melting Slicks
Joined: Sep 2002
Posts: 3,064
Likes: 95
From: MI
Originally Posted by NICK YOSKIN
well here is the deal.
i hooked up a home made pressure gauge using a mechanical boost gauge w/regulator, some l brass fitting and some vacuum lines.
i applied compressed air into the regulator and from there it went into the map sensor that controlls the pump. the gauge read 4 psi nothing 8 nothing 10 nothing(held it there for over 10 seconds) then 15 psi at which it started discharging meth.
well with this there is no doubt that it isnt a bad connection or vapor lock.
bad brain or pump, i am betting bad pump.
i hooked up a home made pressure gauge using a mechanical boost gauge w/regulator, some l brass fitting and some vacuum lines.
i applied compressed air into the regulator and from there it went into the map sensor that controlls the pump. the gauge read 4 psi nothing 8 nothing 10 nothing(held it there for over 10 seconds) then 15 psi at which it started discharging meth.
well with this there is no doubt that it isnt a bad connection or vapor lock.
bad brain or pump, i am betting bad pump.
Burning Brakes
Joined: Nov 1999
Posts: 1,221
Likes: 59
From: Abingdon VA
Originally Posted by NICK YOSKIN
well here is the deal.
i hooked up a home made pressure gauge using a mechanical boost gauge w/regulator, some l brass fitting and some vacuum lines.
i applied compressed air into the regulator and from there it went into the map sensor that controlls the pump. the gauge read 4 psi nothing 8 nothing 10 nothing(held it there for over 10 seconds) then 15 psi at which it started discharging meth.
well with this there is no doubt that it isnt a bad connection or vapor lock.
bad brain or pump, i am betting bad pump.
i hooked up a home made pressure gauge using a mechanical boost gauge w/regulator, some l brass fitting and some vacuum lines.
i applied compressed air into the regulator and from there it went into the map sensor that controlls the pump. the gauge read 4 psi nothing 8 nothing 10 nothing(held it there for over 10 seconds) then 15 psi at which it started discharging meth.
well with this there is no doubt that it isnt a bad connection or vapor lock.
bad brain or pump, i am betting bad pump.
Run down to Advance auto, Autzone, etc and buy a Mityvac for $30. It will make all future tests cake. It's a hand held pump with a built in gage that lets you apply vac or pressure....very simple to use.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,862
Likes: 85
From: PA
St. Jude Donor '08
Originally Posted by onfire
Run down to Advance auto, Autzone, etc and buy a Mityvac for $30. It will make all future tests cake. It's a hand held pump with a built in gage that lets you apply vac or pressure....very simple to use.
thanks....will do. yeah my buddie lent me this one i used.
