Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

sound like the spark plugs are bad?

Thread Tools
 
Search this Thread
 
Old Aug 16, 2012 | 12:20 PM
  #1  
itsMikey's Avatar
Thread Starter
Supreme Member
 
Joined: Apr 2009
Posts: 2,852
Likes: 2
From: Scottsdale, AZ
Car: 89 GTA/93 S13/91 Si
Engine: 5.7 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
sound like the spark plugs are bad?

alright so heres the symptoms:
1. takes 2 cranks to start sometimes
2. loss of power
3. motor speed surge when i let off the throttle
4. when i get into it (wot or a little less) it stumbles and chokes up until i let off
5. high idle every once in a while when i restart it

sooo? what do you guys think? plugs?
Reply
Old Aug 16, 2012 | 03:27 PM
  #2  
deadtrend1's Avatar
Supreme Member
iTrader: (1)
 
Joined: Jul 2001
Posts: 1,509
Likes: 0
From: Maple Shade, NJ
Re: sound like the spark plugs are bad?

I wouldn't assume plugs initially. I would look at fuel pressure and check for vacuum leaks.
Reply
Old Aug 16, 2012 | 03:32 PM
  #3  
TTOP350's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (9)
 
Joined: Oct 2001
Posts: 12,213
Likes: 1,140
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: sound like the spark plugs are bad?

Do you run a K&N airfilter?? if so, try cleaning the maf.
Reply
Old Aug 16, 2012 | 08:59 PM
  #4  
itsMikey's Avatar
Thread Starter
Supreme Member
 
Joined: Apr 2009
Posts: 2,852
Likes: 2
From: Scottsdale, AZ
Car: 89 GTA/93 S13/91 Si
Engine: 5.7 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: sound like the spark plugs are bad?

Originally Posted by deadtrend1
I wouldn't assume plugs initially. I would look at fuel pressure and check for vacuum leaks.
hmm...well my very first thought was fuel filter so i might check that.

the hoses are ALL brand new

Originally Posted by TTOP350
Do you run a K&N airfilter?? if so, try cleaning the maf.
i do but i havent oiled it in a few washes.
Reply
Old Aug 16, 2012 | 11:50 PM
  #5  
itsMikey's Avatar
Thread Starter
Supreme Member
 
Joined: Apr 2009
Posts: 2,852
Likes: 2
From: Scottsdale, AZ
Car: 89 GTA/93 S13/91 Si
Engine: 5.7 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: sound like the spark plugs are bad?

could the maf being dirty do this?
Reply
Old Aug 17, 2012 | 09:25 PM
  #6  
Black88Z's Avatar
Senior Member
 
Joined: Nov 2011
Posts: 507
Likes: 1
From: Charlotte, NC
Car: 1988 IROC-Z Camaro, 1981 Trans Am
Engine: 350 TPI, 301 N/A
Transmission: 700r4, 350thm
Re: sound like the spark plugs are bad?

I would check the plugs (or at least a few) to see how they look. My car needs new valve seals (dont they all lol) but it doesnt really hurt much, if it sits for a while (hr or more) itll take slightly longer to start up, but after that its fine. Even then if i shut it off and restart it starts instantly.

Id start with that and the easy things. Clean and oil your filters. DO NOT OVER-OIL THEM. thats how your iacv gets gunked up. Clean your maf. Clean your IAC valve. While your at it, clean your throttle body and wipe both sides of the blades down with a rag and cleaner (I like seafoam). Since its cheap and easy, change fuel filter. Check your TPS. Ohm fuel injectors. Check your CTS. Loan a vacc gauge and see how much vac your pulling. Even tho the hoses are all new you could still have a leak, and this will definetly rule vacc leaks out of the equation.

Afterwords, if the problem persists, check fuel pressure and maybe even timing if you think that could be the issue.
Reply
Old Aug 18, 2012 | 12:57 AM
  #7  
itsMikey's Avatar
Thread Starter
Supreme Member
 
Joined: Apr 2009
Posts: 2,852
Likes: 2
From: Scottsdale, AZ
Car: 89 GTA/93 S13/91 Si
Engine: 5.7 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: sound like the spark plugs are bad?

thanks dude very thorough will do when i get the time..thanks!
Reply
Old Aug 18, 2012 | 07:58 AM
  #8  
Edwardgp's Avatar
Supreme Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2012
Posts: 2,027
Likes: 33
From: Washington State
Car: 1983 BB 1995 Z28 Camaro's
Engine: 454-350
Transmission: TH350-4l60e
Axle/Gears: 373 posi-Stock
Re: sound like the spark plugs are bad?

Let us know what cleans it up for you.
Reply
Old Aug 19, 2012 | 09:22 PM
  #9  
itsMikey's Avatar
Thread Starter
Supreme Member
 
Joined: Apr 2009
Posts: 2,852
Likes: 2
From: Scottsdale, AZ
Car: 89 GTA/93 S13/91 Si
Engine: 5.7 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: sound like the spark plugs are bad?

will do
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
evilstuie
Exhaust
24
Feb 28, 2016 03:33 PM
Red iroc-z 305
Tech / General Engine
8
Sep 30, 2015 05:22 PM
db057
Tech / General Engine
4
Aug 22, 2015 08:17 PM
Bryan F
Tech / General Engine
2
Aug 18, 2015 02:28 PM




All times are GMT -5. The time now is 11:11 PM.