LT1 Problem... High RPMS BOGGING!!
Thread Starter
On The Tree
Joined: Jan 2009
Posts: 199
Likes: 0
From: Waco, Tx/ Houston, Tx
LT1 Problem... High RPMS BOGGING!! ok so when i am driving and give it WOT it goes to about 4600 rpm and boggs out like it hit a rev limiter, does it from a stop or on the roll... i got my trans rebuilt.. still does it... took it to a tuner i thought maybe my rev limiter was before my shift point for some reason... nope! so wrong again.... took it to a shop he said fuel pressure regulator... nope!!! i ve spent like 2300 on this damn thing already.... still have the problem.... some say opti spark $250 some say fuel pump $180... UGH!!!!
BTW no engine code but an low coolant level switch light on...
and it back fires all the damn time!!!
can anyone help me!!!!
:bang
THANKS GUYS
BTW no engine code but an low coolant level switch light on...
and it back fires all the damn time!!!
can anyone help me!!!!
:bangTHANKS GUYS
ok so when i am driving and give it WOT it goes to about 4600 rpm and boggs out like it hit a rev limiter, does it from a stop or on the roll... i got my trans rebuilt.. still does it... took it to a tuner i thought maybe my rev limiter was before my shift point for some reason... nope! so wrong again.... took it to a shop he said fuel pressure regulator... nope!!! i ve spent like 2300 on this damn thing already.... still have the problem.... some say opti spark $250 some say fuel pump $180... UGH!!!!
BTW no engine code but an low coolant level switch light on...
and it back fires all the damn time!!!
can anyone help me!!!!:bang
THANKS GUYS
BTW no engine code but an low coolant level switch light on...
and it back fires all the damn time!!!
can anyone help me!!!!
:bangTHANKS GUYS
Thread Starter
On The Tree
Joined: Jan 2009
Posts: 199
Likes: 0
From: Waco, Tx/ Houston, Tx
Yeah i put it on a fuel pressure test and when the key shut off it was at 45 psi. when it turned on and drove around or rev'ed up it dropped to about 38 psi. could that be a problem?
Btw how hard is it to take it off? what do you need?
Btw how hard is it to take it off? what do you need?
Thread Starter
On The Tree
Joined: Jan 2009
Posts: 199
Likes: 0
From: Waco, Tx/ Houston, Tx
hey ball ss.... can u give me any reasons why the valve springs??? thanks guys pretty soon i will be changing opti spark along with plugs and wires. if that dont work then fuel pump and fuel filter. if that dont work keep checkin youtube cause am gunna blow this bitch up!!!
BTW thanks guys!!
BTW thanks guys!!
Here is the best deal you will find for a genuine OEM opti:
http://cgi.ebay.com/ebaymotors/95-96...mZ350172822694
Just make sure to remove the cap and thread lock the rotor screws before you install it.
http://cgi.ebay.com/ebaymotors/95-96...mZ350172822694
Just make sure to remove the cap and thread lock the rotor screws before you install it.
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TECH Apprentice
Joined: Oct 2008
Posts: 324
Likes: 0
From: Aurora Ill
Not trying to hi-jack
I have the same issue. Mine happens later in the rpm band though.
About 5700 or so,no back fire or anything,it just starts to cut out kinda similar to hitting the limiter. My limiter is set at 6200.
My opti is new,plugs are recent and the last I checked the wires were good(recently replaced).
I was gonna wait to trouble shoot though until I install my valve springs to see if maybe its just valva float.
Anyother suggestions?
I have the same issue. Mine happens later in the rpm band though.
About 5700 or so,no back fire or anything,it just starts to cut out kinda similar to hitting the limiter. My limiter is set at 6200.
My opti is new,plugs are recent and the last I checked the wires were good(recently replaced).
I was gonna wait to trouble shoot though until I install my valve springs to see if maybe its just valva float.
Anyother suggestions?
Not trying to hi-jack
I have the same issue. Mine happens later in the rpm band though.
About 5700 or so,no back fire or anything,it just starts to cut out kinda similar to hitting the limiter. My limiter is set at 6200.
My opti is new,plugs are recent and the last I checked the wires were good(recently replaced).
I was gonna wait to trouble shoot though until I install my valve springs to see if maybe its just valva float.
Anyother suggestions?
I have the same issue. Mine happens later in the rpm band though.
About 5700 or so,no back fire or anything,it just starts to cut out kinda similar to hitting the limiter. My limiter is set at 6200.
My opti is new,plugs are recent and the last I checked the wires were good(recently replaced).
I was gonna wait to trouble shoot though until I install my valve springs to see if maybe its just valva float.
Anyother suggestions?
hey ball ss.... can u give me any reasons why the valve springs??? thanks guys pretty soon i will be changing opti spark along with plugs and wires. if that dont work then fuel pump and fuel filter. if that dont work keep checkin youtube cause am gunna blow this bitch up!!!
BTW thanks guys!!
BTW thanks guys!!
Im not one to say, "ITS THE OPTI" but its narrowing down to that...
TECH Apprentice
Joined: Oct 2008
Posts: 324
Likes: 0
From: Aurora Ill
I hope its not my tranny. That only has about 5k on it!
As far as valve springs getting weak at about 100k,im at 104k on mine. That's why I said ill dig deeper once I swap those. Just seeing if there is anything else I should look at.
Thanks for the tip.
Dale
As far as valve springs getting weak at about 100k,im at 104k on mine. That's why I said ill dig deeper once I swap those. Just seeing if there is anything else I should look at.
Thanks for the tip.
Dale
ok so when i am driving and give it WOT it goes to about 4600 rpm and boggs out like it hit a rev limiter, does it from a stop or on the roll... i got my trans rebuilt.. still does it... took it to a tuner i thought maybe my rev limiter was before my shift point for some reason... nope! so wrong again.... took it to a shop he said fuel pressure regulator... nope!!! i ve spent like 2300 on this damn thing already.... still have the problem.... some say opti spark $250 some say fuel pump $180... UGH!!!!
BTW no engine code but an low coolant level switch light on...
and it back fires all the damn time!!!
can anyone help me!!!!:bang
THANKS GUYS
BTW no engine code but an low coolant level switch light on...
and it back fires all the damn time!!!
can anyone help me!!!!
:bangTHANKS GUYS
Had a similar problem with my 94 A4.. Had my tranny rebuilt and it went away..
I've heard the Lt1 need new valve springs after 100k miles.. I replaced mine recently(112k) and Ill swear my car picked up some...(took me awhile so it prolly was just in my head, lol).
Im not one to say, "ITS THE OPTI" but its narrowing down to that...
I've heard the Lt1 need new valve springs after 100k miles.. I replaced mine recently(112k) and Ill swear my car picked up some...(took me awhile so it prolly was just in my head, lol).
Im not one to say, "ITS THE OPTI" but its narrowing down to that...
The spec for fuel pressure is 43.5psi with the vacuum line disconnected from the fpr, but anywhere from 41-47 is fine. 38psi with the vacuum line connected sounds acceptable, that shouldn't be the cause of your miss/stumble.
I seriously doubt its the springs either.
I seriously doubt its the springs either.
Thread Starter
On The Tree
Joined: Jan 2009
Posts: 199
Likes: 0
From: Waco, Tx/ Houston, Tx
OK Thanks all that helped. i will be buying a new AC Delco opti spark soon and installing it. should i go ahead and replace plugs and wires also? if so what are the best plugs and wires i could ****** up for my mods?
Get NGK TR55 plugs and MSD 8.5mm wires.
whatever you do DONT GET PLATINUM OR IRIDIUM PLUGS! all you need is standard plugs they perform the best and have a stronger spark I use NGK tr55's and tr6's for spray. as far as wires go I have msd 8.5's and don't have any issues with them but I don't think its necessary unless your wires appear to be damaged.