5.9 magnum hates mods?
#809912
09/21/10 01:37 AM
09/21/10 01:37 AM
|
Joined: Aug 2010
Posts: 16 Bellville, Texas
Ultanium
OP
member
|
OP
member
Joined: Aug 2010
Posts: 16
Bellville, Texas
|
I have been building a dak much like the scat Dak project in Mopar Action. I started with a '95 truck with a 5.2, dropped in a '94 5.9 & Mopar computer, & drove the tires off it. Got a few bucks saved up, added a comp cams 262 roller (260/262 .480/512), new lifters, double roller chain (0°), m1, EQ heads (2.02), all new sensors, large manifolds like Ehrenberg used, stock injectors & TB. We fired it up today, & no matter what we did, it was a dog. It idles rough, dies often, & I feel like I wasted my time & money. EGR seems fine, playing with the timing made it a little better, but harder to start. Any ideas on why this thing doesn't even bark the tires? Appreciate any advice!!
Tom in Texas
|
|
|
Re: 5.9 magnum hates mods?
[Re: b1llyw]
#809920
09/21/10 09:37 AM
09/21/10 09:37 AM
|
Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
|
Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
|
Quote:
Sounds to me like the fuel sync is way off. That combo should work fine with that PCM. Get your fuel sync set, see where that leaves you. You are probably borderline on injector sizing.
Could his TB be too small? I mean what do those 2bbl (2 hole) flow? 500-600cfm max????
|
|
|
Re: 5.9 magnum hates mods?
[Re: Mr.Yuck]
#809921
09/21/10 09:43 AM
09/21/10 09:43 AM
|
Joined: Feb 2003
Posts: 203 CT
b1llyw
super street
|
super street
Joined: Feb 2003
Posts: 203
CT
|
Quote:
Quote:
Sounds to me like the fuel sync is way off. That combo should work fine with that PCM. Get your fuel sync set, see where that leaves you. You are probably borderline on injector sizing.
Could his TB be too small? I mean what do those 2bbl (2 hole) flow? 500-600cfm max????
He would benefit from a larger throttle body but it's not small enough to cause these kinds of problems. I'd recommend this guy if he decides to upgrade.
http://stores.hi-potek.com/-strse-DAKOTA-cln-ENGINE-cln-Throttle-Body/Categories.bok
|
|
|
Re: 5.9 magnum hates mods?
[Re: Mr.Yuck]
#809922
09/21/10 10:23 AM
09/21/10 10:23 AM
|
Joined: Jun 2008
Posts: 10,847 Oakdale CT
gdonovan
I Live Here
|
I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
|
Quote:
Could his TB be too small? I mean what do those 2bbl (2 hole) flow? 500-600cfm max????
Would not explain the idle issue, the throttle blades are closed.
At that point what the throttle body flows in a non-issue.
Start with the basics, set the fuel sync (distributor) which is critical for proper operation.
|
|
|
Re: 5.9 magnum hates mods?
[Re: gdonovan]
#809923
09/21/10 10:43 AM
09/21/10 10:43 AM
|
Joined: Feb 2003
Posts: 203 CT
b1llyw
super street
|
super street
Joined: Feb 2003
Posts: 203
CT
|
|
|
|
Re: 5.9 magnum hates mods?
[Re: zrxkawboy]
#809925
09/21/10 12:31 PM
09/21/10 12:31 PM
|
Joined: Feb 2003
Posts: 203 CT
b1llyw
super street
|
super street
Joined: Feb 2003
Posts: 203
CT
|
Quote:
Quote:
playing with the timing made it a little better
I didn't think timing was adjustable...?
You can play with the timing chain and/or crank sensor to play with base timing.
|
|
|
|
|