new guy needs help, tpi breaken up on top end...
#1
Guest
Posts: n/a
new guy needs help, tpi breaken up on top end...
(copy and paste from a chat with buddy)
Hey all, new guy here,
My beast of the night is a 1988 IROC-Z, stock L98.
This problem just started yesterday.
ok, so at wot around 4500 rpm ( in 2nd ) the car starts to...-slightly- break up or feel like it, then at wot in 3rd around 3500 you can feel it breking up....( I think it gets worse when holding wot, ill do a back road test again today... )
---first gear its all fine---
-thanks guys, need to get this fixed before me and my buddy put a king of the hill tpi on it.
; P
Hey all, new guy here,
My beast of the night is a 1988 IROC-Z, stock L98.
This problem just started yesterday.
ok, so at wot around 4500 rpm ( in 2nd ) the car starts to...-slightly- break up or feel like it, then at wot in 3rd around 3500 you can feel it breking up....( I think it gets worse when holding wot, ill do a back road test again today... )
---first gear its all fine---
-thanks guys, need to get this fixed before me and my buddy put a king of the hill tpi on it.
; P
#2
Moderator
iTrader: (14)
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,169
Likes: 0
Received 36 Likes
on
34 Posts
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Welcome aboard thirdgen.org.
First thoughts are fuel delivery (fuel pump or fuel filter, or both), or ignition (spark plugs, spark plug wires, distributor cap, rotor, coil, etc.).
First thoughts are fuel delivery (fuel pump or fuel filter, or both), or ignition (spark plugs, spark plug wires, distributor cap, rotor, coil, etc.).
#3
Supreme Member
Join Date: Jan 2009
Location: Columbus Ohio
Posts: 1,126
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 Z28,64ImpalaSS4094spd,67 Galaxy
Engine: Dart 415Profiler hd,cmprlrs,Hlly750
Transmission: Built 700R4, 3200 stall
Axle/Gears: 3:89 Moser 9"
Re: new guy needs help, tpi breaken up on top end...
Check fuel pressure, at idle and throughout rpm range, you are gonna have to look up specs, as I cannot remember where it should be , 48-52psi seems right, but I'd double check that. If low, I'd do like James says, fuel filter, then the pump next.....
#4
Guest
Posts: n/a
Re: new guy needs help, tpi breaken up on top end...
afternoon all,
updates:
car seams to be doing a tad bit better now...mabye alil faster than what it was just a week ago...mabye this cold air plus the new 180 stat? ^_^
did a freeway pull and the problem started happening around 4K in third, also 2nd mabye ALL fine as well.....my buddy will look at this evening.
-Also I had a full tune up (everything, the mech was a geard head as well and got me a discount ^_^)
this was 12/x/2008 so....I shouldnt need another 1...hmmm-
--wheir was I?....dont remember.
---Guess thatll be all for this up date
----Pat
P.S. cant wait for th weather to turn around and my other buddy to get done with that BIG TPI!!!
updates:
car seams to be doing a tad bit better now...mabye alil faster than what it was just a week ago...mabye this cold air plus the new 180 stat? ^_^
did a freeway pull and the problem started happening around 4K in third, also 2nd mabye ALL fine as well.....my buddy will look at this evening.
-Also I had a full tune up (everything, the mech was a geard head as well and got me a discount ^_^)
this was 12/x/2008 so....I shouldnt need another 1...hmmm-
--wheir was I?....dont remember.
---Guess thatll be all for this up date
----Pat
P.S. cant wait for th weather to turn around and my other buddy to get done with that BIG TPI!!!
#7
Supreme Member
Join Date: Feb 2006
Location: Sanctuary state
Posts: 1,777
Likes: 0
Received 27 Likes
on
24 Posts
Car: 67 ******mobile
Engine: 385 Solid roller
Transmission: T-56
Axle/Gears: 4.11
Re: new guy needs help, tpi breaken up on top end...
Put a fuel pressure gauge on your shrader valve, tape it to the windshield and check the FP under load
Or tape a friend to the hood and stick the gauge in his mouth so it faces you.
Or tape a friend to the hood and stick the gauge in his mouth so it faces you.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
Zachattack0925
Transmissions and Drivetrain
4
08-12-2015 09:52 PM
Sanjay
Engine/Drivetrain/Suspension Parts for Sale
1
08-12-2015 03:41 PM