Misfire issue

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

B

beardeddummy

I'm Awesome
Joined
Dec 24, 2014
Messages
623
Reaction score
132
Location
arkansas
I have a miss at idle and under light load I have done heads, injectors, coil, distributor, plugs, wires, tps, fuel pump fuel filter, ignition control module, map sensor and maf. I've also swapped my factory computer back in. so I'm lost any ideas? truck runs great otherwise.

97 k1500 5.7
 
slowburb

slowburb

all motor
Joined
Mar 26, 2011
Messages
1,632
Reaction score
676
Location
Louisiana
I don't think there's anything left to replace. When you say you "did" the heads, what did you "do"?
 
B

beardeddummy

I'm Awesome
Joined
Dec 24, 2014
Messages
623
Reaction score
132
Location
arkansas
They were cracked so I ordered new ones had a professional port and polish them took them to a machine shop and had them dress them. had help with putting them on because wanted to make sure it was done right.
 
M

michael hurd

Stalker be gone.
Joined
Jul 30, 2012
Messages
1,876
Reaction score
603
Was the distributor set correctly, or was it a 'stab' in the general area?
 
SAATR

SAATR

/\___/\___/\___/\___/\
Supporting Member
Joined
Dec 16, 2010
Messages
2,650
Reaction score
946
Location
Loo E Z an uh
Do you have a P030X code? Any codes? Have you checked live data or data logged to check your sensor inputs to make sure everything looks right? Stuck or sticking EGR can cause what you describe, though you generally get a code with the OBDII engines. Sounds like you've fired the parts cannon at this thing.

Sent from my XT1585 using Tapatalk
 
B

beardeddummy

I'm Awesome
Joined
Dec 24, 2014
Messages
623
Reaction score
132
Location
arkansas
No codes misfire is completely random. no egr at all. it had cracked heads so I looked at it all as maintenance.
 
S

Supercharged111

Truly Awesome
Joined
Aug 20, 2015
Messages
12,717
Reaction score
15,523
Could be the spider. That's what making mine miss, idle only. Check your fuel pressure at idle and cracking it WOT as well. WOT should be around 60. I replaced my fuel filter earlier this year as it was getting a bit plugged and the bump in pressure there made the truck noticeably less bad. The poppets are very sensitive to pressure.
 
You must log in or register to reply here.

Similar threads

B
1997 C1500 P0307 Misfire
Replies
5
Views
645
blackburb
B
B
1998 K3500 5.7 Misfire No code
Replies
3
Views
636
emarkay
E
D
I’m out of ideas now. Random misfire, hard start.
2 3
Replies
21
Views
928
Dlipp_
D
D
5.7 Random Misfire & Hard start Help
Replies
3
Views
305
Dlipp_
D
J
P0300 but seeing cylinder 4 misfire
Replies
0
Views
136
jays99burb
J

Latest posts

Members online

... and 4 more.
Total: 1,422 (members: 54, guests: 1,368)

Forum statistics

Threads
64,249
Messages
1,389,877
Members
51,243
Latest member
TruckinAnissa707

Share this page

Top