|
|
spittin and sputtering 1990 chevy truck
|
|
|
| |
|
|
richardlice
User
Jun 25, 2014, 10:07 AM
Post #1 of 24
(2162 views)
|
|
spittin and sputtering 1990 chevy truck
|
Sign In
|
|
1990
chevrolet
cheyenne 1500
4.3 v6
turbo 400 trans.
120***
i just replaced the motor, the motor seems to run fine when at an idle in park or neutral, when i put it into gear and try to go it spits and sputters, when i get up to about 30 mph it seems to smooth out until i try to give it more throttle then it bogs down real hard, and starts the spitting and sputtering again with an occasional backfire, (my harbor freight timing light says its on time) the car also jerks every time it sputters. my first thought was a vacuum leak, i have checked my vacuum lines they all seem fine.
just not sure where else to look besides vacuum and timing.
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Jun 25, 2014, 10:48 AM
Post #2 of 24
(2152 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
Is this still fuel injected? Any trouble codes stored in the ECM? What is the fuel pressure doing the bogging?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
|
|
| |
|
|
richardlice
User
Jun 25, 2014, 11:03 AM
Post #3 of 24
(2147 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
throttle body injection no codes, wont bog or spit unless under load at 10 - 15mph then again at about 30-45
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Jun 25, 2014, 11:08 AM
Post #4 of 24
(2143 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
What is the fuel pressure when the bogging is going on? Vacuum leak won't cause bogging on acceleration.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jun 25, 2014, 11:09 AM)
|
|
| |
|
|
richardlice
User
Jun 25, 2014, 11:41 AM
Post #5 of 24
(2138 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
i cant test the fuel pressure with the car running there is no valve to check i would have to disconnect the fuel line from the throttle body to test
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 25, 2014, 12:02 PM
Post #6 of 24
(2133 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
They make an adapter that substituted for the fuel filter.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
richardlice
User
Jun 25, 2014, 12:03 PM
Post #7 of 24
(2131 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
ok ill get one in the morning
would it hurt to go ahead and change the fuel pressure regulator
(This post was edited by richardlice on Jun 25, 2014, 12:03 PM)
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 25, 2014, 12:04 PM
Post #8 of 24
(2128 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
Why replace parts for no reason?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
richardlice
User
Jun 26, 2014, 1:07 AM
Post #9 of 24
(2096 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
drove this morning to work now pretty much does the spitting and sputtering and backfiring when i try to give it gas, put it in neutral runs fine. going to get the test gauge at lunch,
|
|
| |
|
|
richardlice
User
Jun 26, 2014, 7:58 AM
Post #10 of 24
(2088 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
i have between 11 and 12 psi after the fuel filter
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 26, 2014, 8:12 AM
Post #11 of 24
(2086 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
Was that tested with the engine running and the problem occurring?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
richardlice
User
Jun 26, 2014, 8:39 AM
Post #12 of 24
(2083 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
yes with the engine running and the bogging happening at the same time no change in fuel pressure under load and without
also started doing it at an idle now unless i barely press the gas then it idles fine
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 26, 2014, 8:48 AM
Post #13 of 24
(2080 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
OK, fuel pressure is ruled out then. I would be highly suspicious of all of the secondary igniition but the the coil or coil wire most of all.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
richardlice
User
Jun 26, 2014, 9:29 AM
Post #14 of 24
(2078 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
what is the secondary ignition/
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jun 26, 2014, 10:45 AM
Post #15 of 24
(2074 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
That would consist of the cap, rotor, wires, plugs and coil, everything that carries high voltage.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Discretesignals
Ultimate Carjunky
/ Moderator
Jun 26, 2014, 10:56 AM
Post #16 of 24
(2069 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
Did this problem start after you did the motor mounts? If so, you should check to make sure the distributor cap wasn't damaged when the motor was jacked up.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
|
|
| |
|
|
richardlice
User
Jul 11, 2014, 3:05 AM
Post #17 of 24
(2007 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
distributor was cracked at the base causing it to wobble a little causing the misfiring, I changed distributor, cap and button, got it running, came out this morning it fired up drove a mile and now the injectors seem to have quit, they dont prime when you crank the motor i can hear the fuel pump kick on with the gas cap off, sitting at about a 1/4 tank of gas.
|
|
| |
|
|
Hammer Time
Ultimate Carjunky
/ Moderator
Jul 11, 2014, 3:23 AM
Post #18 of 24
(2006 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
Check the fuel pressure again and test for injector pulse with a noid light.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 11, 2014, 3:50 AM
Post #19 of 24
(2003 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
Question: "Distributor Cracked" or the Cap and Rotor?
Cap and rotor =..........
Distributor is this= ..............two views....
From top if it shows.........
What broke where?
T
|
|
| |
|
|
richardlice
User
Jul 11, 2014, 4:00 AM
Post #20 of 24
(1998 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
the bottom plate of the dizzy the part that the cap screws into, it came apart from the shaft
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 11, 2014, 4:12 AM
Post #21 of 24
(1993 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
OK - I interpret that as in the bottom pic - right? If broken there cap and rotor are separate and couldn't fix crack in distributor itself. If that broken it wobbles shaft the rotor would trash the cap again right away??
T
(This post was edited by Tom Greenleaf on Jul 11, 2014, 4:13 AM)
|
|
| |
|
|
richardlice
User
Jul 11, 2014, 4:15 AM
Post #22 of 24
(1987 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
more like the middle picture where the plate and dist. shaft meet.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 11, 2014, 4:27 AM
Post #23 of 24
(1983 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
Understand I think? If the cap or rotor involved new ones of those do nothing. Shaft has bushing that can wear out. Most a PITA to do just bushings so most would go for a new or rebuilt unit with new module and one showed whole set up with cap and rotor too for just $10 bucks more.
The metal and shaft is the distributor not the cap and rotor which depend on it being correct and certainly not wobble. Might not even be the issue at hand but side to side wobble of shaft can't hold rotor in place and CRASH out with cap almost certainly if bad enough to notice it wobble, T
|
|
| |
|
|
richardlice
User
Jul 11, 2014, 5:05 AM
Post #24 of 24
(1977 views)
|
|
Re: spittin and sputtering 1990 chevy truck
|
Sign In
|
|
i got a distr. from the pull it yard for 10 bucks it seems to work fine, i have to go to town to get the test light set its like 20.
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 
2006 Toyoto Camry XLE Driver Side Electric Window Trouble
Tierod end change caused some kind of leak
Grounding Cable, 2017 Jeep Renegade Trailhawk
equipment
Howdy
