K guys so its been months now and my celica is still down on power. I've had other people who have had 6th gen st's drive it and they say the same. Like I stated earlier in the thread my friend advanced the timing almost all the way to get the thing operating normal or at least semi-normal. However there is still a noticeable power loss and I'm having trouble diagnosing it. I'm over at my friends house and we are going to vacuum test it tomorrow as well as retard the timing back to factory to try and trace the problem. If you guys have any suggestions as to what else might cause the power loss it would be greatly appreciated.
The following have been ruled out:
spark plugs(replaced)
spark plug wires(replaced)
fuel filter(replaced)
injectors(do not contain water)
No check engine light or other idiot lights so NO code to diagnose
Distributor has no water and appears to be working fine
Thanks again guys
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has there been any other work done. did it just randomly one day decide to not have any power? was there any major maintenance done on it around the time that it started actin up? i.e. timing belt, water pump, oil pump..... blah blah. does the exhaust tone sound normal? like does it sound like a subaru? (it may sound funny but i had a buddy throw a rocker on an sr20 on the intake side and it sounded exactly like a boxer engine, this resulted in a bent valve by the way). does it pass a compression test?
Former Team 5SFTE pro member ;)13.6@108MPH, 5SFTE Powered
I read fuel filter but not fuel pump
What I think when you think I care
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QUOTE (presure2 @ Oct 1, 2011 - 10:28 AM)
>timing.
You should listen to this guy.
Sorry guys. Little back story. Took the car to the carwash. Pressurewashed bay (grocery bag over dizzy etc. Left the carwash and had subbie sounding celica so I pulled over and one of the connections on the dizzy from the spark plug wires had gotten knocked loose. Ran fine home. Let car sitt for a couple of days and went to go somewhere and boom subbie celica(firing was off). Checked the spark plug wires resistance and one was bad so I got new wires. Checked the dizzy, injectors, changed plugs and wires but have had problems ever since. I don't think the fuel pump is bad. Have not done compression test but that is soon. Car us pulling vacuum and no vacuum lines are missing. Thanks. Hope this helps. Its been underpowered for months. With the distributor advanced all the way it fires normally but retarding the dizzy will make it subbie celi once again.
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Sorry guys. Little back story. Took the car to the carwash. Pressurewashed bay (grocery bag over dizzy etc. Left the carwash and had subbie sounding celica so I pulled over and one of the connections on the dizzy from the spark plug wires had gotten knocked loose. Ran fine home. Let car sitt for a couple of days and went to go somewhere and boom subbie celica(firing was off). Checked the spark plug wires resistance and one was bad so I got new wires. Checked the dizzy, injectors, changed plugs and wires but have had problems ever since. I don't think the fuel pump is bad. Have not done compression test but that is soon. Car us pulling vacuum and no vacuum lines are missing. Thanks. Hope this helps. Its been underpowered for months. With the distributor advanced all the way it fires normally but retarding the dizzy will make it subbie celi once again.
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my 7GC did went Subie on me! was the coil on plugs...maybe check the module thing that feeds to the dizzy?
What I think when you think I care
Failing cam position sensor? Bad ECM? Bad knock sensor? Bad MAP sensor? Faulty distributor?
2000 Celica GTS 'slowest gts evar'1998 Mazda 626 FS-DE/CD4-E
you should replace the cap n rotor.
also you couldve jumped a tooth on ur timing belt..
QUOTE"And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH1994 GT:V6 swap, 5speed E53 W/ LSD, All Power, now RED1995 ST:SOLD @273k miles, Auto, all power, CarPC, White1994 ST:Totaled, 5spd, all power, RedRIP 07/09/09 @ 241,8101994 Lexus LS400:This is my new DD
sorry guys I meant to put that I've already replaced cap and rotor
jumping a tooth may be a possibility b/c I haven't had the timing cover off to check
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Just to get a safe answer, pull the cover off...
'97 ST\ Eibach \ KYB \ Kenwood \ Alpine \ Cusco \ OEM+[sold 10/18]'93 MX-5LE
turn engine till notch on crank pulley lines up wit the 0* mark on the timin cover. pull valve cover off. hole in timing gear should match with notch in camshaft cap behind it
QUOTE"And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH1994 GT:V6 swap, 5speed E53 W/ LSD, All Power, now RED1995 ST:SOLD @273k miles, Auto, all power, CarPC, White1994 ST:Totaled, 5spd, all power, RedRIP 07/09/09 @ 241,8101994 Lexus LS400:This is my new DD
may i know what kind of power loss is it? is turbo boosting correctly? how many psi? or is it an hesitation power loss?
lol no turbo spool at all!
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QUOTE (Rav4Race @ Oct 3, 2011 - 2:50 AM)
>may i know what kind of power loss is it? is turbo boosting correctly? how many psi? or is it an hesitation power loss?
Yeah man sorry no turbo here. Wish we had more gt4's in the states.
will be checking timing by this weekend
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Here's a 0-55ish video we took to show how slow it is now. We're pretty sure it slipped timing. So we'll take off the valve cover tomorrow to check like you guys suggested.
http://youtu.be/WpSvCfQJCJ0
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QUOTE (j0ch0a94ST @ Oct 13, 2011 - 6:57 PM)
>Here's a 0-55ish video we took to show how slow it is now. We're pretty sure it slipped timing. So we'll take off the valve cover tomorrow to check like you guys suggested.
http://youtu.be/WpSvCfQJCJ0That vid actual doesnt help your case any. That performance is about right for the 7a. Idk what kind of performance you were getting before, but anything more than what was shown in the video would not be for a stock 7a.
timing belt off? affecting your ignition timing.
check anything with your ignition as well.
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that does sound a bit sluggish and I used to own a 7A with an auto trans.
2000 Celica GTS 'slowest gts evar'1998 Mazda 626 FS-DE/CD4-E
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QUOTE (d3ath2009 @ Oct 13, 2011 - 7:02 PM)
>That vid actual doesnt help your case any. That performance is about right for the 7a. Idk what kind of performance you were getting before, but anything more than what was shown in the video would not be for a stock 7a.
How is that anything close to stock? That was like 17 seconds to 55. Thats not even CLOSE to stock performance for the 7A.
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^ Truth. 7A is "slow," but that not slow. My auto accelerates faster than this.
'97 ST\ Eibach \ KYB \ Kenwood \ Alpine \ Cusco \ OEM+[sold 10/18]'93 MX-5LE
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QUOTE (stephen_lee @ Oct 2, 2011 - 1:50 PM)
>turn engine till notch on crank pulley lines up wit the 0* mark on the timin cover. pull valve cover off. hole in timing gear should match with notch in camshaft cap behind it
try this
QUOTE"And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH1994 GT:V6 swap, 5speed E53 W/ LSD, All Power, now RED1995 ST:SOLD @273k miles, Auto, all power, CarPC, White1994 ST:Totaled, 5spd, all power, RedRIP 07/09/09 @ 241,8101994 Lexus LS400:This is my new DD
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QUOTE (stephen_lee @ Oct 2, 2011 - 1:50 PM)
>turn engine till notch on crank pulley lines up wit the 0* mark on the timin cover. pull valve cover off. hole in timing gear should match with notch in camshaft cap behind it
So we did this today and the timing is correct, tdc is correct etc. Also we did a compression check and results were as follows:
Compression on #1 Cylinder = 200
Compression on #2 Cylinder = 190
Compression on #3 Cylinder = 200
Compression on #4 Cylinder = 190
To add when I was underneath the car turning the motor over by hand, I could hear what appeared to be pressure or air escaping. I'm not sure if this is normal but it sounded like it was coming from inside the cylinders so that's why we did the compression check. I'm probably going to buy a vacuum gauge this weekend and check that as well. Any other ideas guys? It is much appreciated
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Well an engine is basically a giant airpump if it isnt exploding with fuel...how was the "air escaping" sound like? air going out of cracks?
What I think when you think I care
air will leak pass the rings when u spin the motor slowly. you hear this
QUOTE"And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH1994 GT:V6 swap, 5speed E53 W/ LSD, All Power, now RED1995 ST:SOLD @273k miles, Auto, all power, CarPC, White1994 ST:Totaled, 5spd, all power, RedRIP 07/09/09 @ 241,8101994 Lexus LS400:This is my new DD
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QUOTE (stephen_lee @ Oct 16, 2011 - 1:13 PM)
>air will leak pass the rings when u spin the motor slowly. you hear this
Thanks man it is appreciated. I wasn't sure if that was normal. However you have any ideas on what else may be causing the powerloss? Thanks
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did you get everything figured out?
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QUOTE (ricochet1490 @ Oct 23, 2011 - 11:45 PM)
>did you get everything figured out?
Throwing the vacuum gauge on it sometime this week
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This may sound stupid, but is your e-brake stuck in position?
Cause if compression is good, timing is good...i'm confused =P
