I have a 1992 Newmar Kountry Star RV that is having some problems. It starts easily but within a minute or two, the check engine light comes on, then the engine dies. Have replaced the MAF sensor and the throttle position sensor. Also replaced the pickup coil in the distributor. I have been unable to locate the diagnostic port, to see why the check engine light is coming on. Anyone have any idea where they hid the diagnostic port on this thing? Any help is greatly appreciated. -Larry

Your rig is probably on a 1991 Chassis OBD II did not come out until 1993 at the earliest IIRC

best advice i can offerlook up your chevy 454 P30 chassisor Ford 460 f53 chassis ?by the year and chassisget the manual and go from there

Description of symptom is incompleteIt dies...In detail describe what happens from there, please...

After the engine runs for a minute or so, it starts to sputter like it is starving for fuel. I thought that possibly the fuel pump was going bad, but a fuel pressure gauge shows that the fuel pressure is steady around 40 psi. Checked that the air flow was unobstructed, and it is getting air just fine. A spark tester shows a strong spark, right up until the check engine light comes on, then the spark weakens, the engine sputters, then dies.I have searched for the diagnostic plug to try to determine why the light is coming on, but have been unable to locate it. I know if is the older style that will require jumpering and reading the flashing light, but I just can't seem to find it.It is a Ford 460 engine.Thanks,-Larry

http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/25975344.cfm

1992 Newmar Kountry Star | Good Sam Community

ralphnjoann
Explorer
Aug 18, 2017
bucky wrote:
OBD2 began in 96 model year.
Not for a 1996 PowerStroke.
MrWizard
Moderator
Aug 18, 2017
I know my 95 DP does not have any diagnostic Port
bucky
Explorer II
Aug 20, 2017
ralphnjoann wrote:
bucky wrote:
OBD2 began in 96 model year.
Not for a 1996 PowerStroke.

If you want to split hairs I don't think that engine was named as a powerstroke until the 98 model year even though it was a 7.3. My former PSD was built in very early 1997 but still titled as a 98. My 98 24V Cummins did have an OBD2 diag port. I don't remember if the 98 PSD did.
You are correct that diesel engines did not have the same emission standards at that time that the gassers did. Now they have far worse standards.
Gjac
Explorer III
Aug 20, 2017
Larry I assume the OBD1 on a Ford is similar to the OBD1 on the Chevy chassis. I have a Chevy, the codes are retrieved by shorting out A and B connections with a paper clip and watching the flashing check engine light on the dashboard. Look under the dash on the drivers side. Probably black plastic with a plastic cover over it. Google Ford OBD1 codes and they will tell you what each means based on the number of flashes.

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