94 need advice

**no1sirbutler** · 04-07-2011, 08:56 PM

Roger....put the passenger kick panel and unbolt the computer. Youll see a black plastic plug, if not youll see a chip sticking out.....if it has a chip its been tuned.

**RogerStout** · 04-07-2011, 09:09 PM

Coo thanks Mike.. Looks like I will be ordering a FPR and a code reader tomorrow..

**no1sirbutler** · 04-07-2011, 09:18 PM

Sweet talk Kuneff and we might be able to borrow his for a day for so.

**RogerStout** · 04-07-2011, 09:36 PM

Fox and SN95 regulators are different part numbers... :(

**speedracer** · 04-07-2011, 09:36 PM

Originally Posted by RogerStout

Coo thanks Mike.. Looks like I will be ordering a FPR and a code reader tomorrow..

I had a FPR go bad on the 460 in my work truck, it ran like poo.

**RogerStout** · 04-07-2011, 09:38 PM

Idle like shit and sputter under load?

**RogerStout** · 04-07-2011, 09:41 PM

113 for a regulator.. I hope its fixes but I am not confident my money spending is over LOL

**SAC81** · 04-07-2011, 09:50 PM

Sounds like it's got more than one problem. Since you found fuel in the vac line to it, replacing the FPR is a good start.

**speedracer** · 04-07-2011, 09:55 PM

Originally Posted by RogerStout

Idle like shit and sputter under load?

It's been a few years, I knew something was wrong... after some looking found gas in the vac line to the FPR.

**no1sirbutler** · 04-07-2011, 10:38 PM

Originally Posted by RogerStout

Fox and SN95 regulators are different part numbers... :(

I meant scanner lol no way in hell I would take parts off his fox after its finally back together and running.

**RogerStout** · 04-07-2011, 11:44 PM

Originally Posted by no1sirbutler

I meant scanner lol no way in hell I would take parts off his fox after its finally back together and running.

O cool he has a scanner.. Sweet I will give him a call.

**RogerStout** · 04-09-2011, 12:40 AM

Here are a couple FPR I found on summit anyone use these or can recommend one..

http://www.summitracing.com/parts/PFS-10681/

and

http://www.summitracing.com/parts/AEI-13102/

**Mark Aubele** · 04-09-2011, 12:57 AM

Originally Posted by RogerStout

Here are a couple FPR I found on summit anyone use these or can recommend one..

http://www.summitracing.com/parts/PFS-10681/

and

http://www.summitracing.com/parts/AEI-13102/

I have used the Aeromotive, but if I were buying one today, I'd save the money and pick up the Professional Products one.

**RogerStout** · 04-10-2011, 08:04 PM

Well I knew ordering the FPR sat or sunday would make no difference cause of shipping so I held out and did some more testing.

TFI tested and passed 5 times.
Replaced fuel filter
used a whole can of carb cleaner shooting vac lines and intake manifold (nothing)
Check the timing again still on 12deg

The car still stumbles during idle and hesitates at WOT.

Fuel pressure holding at 38 idle swings to 45 WOT then drops to 30ish and recovers to 38 back to idle.

Voltage on the TPS is .98 idle and 1.64 WOT I think that is out of range for WOT but dont know how much of an effect that will have.

I am still leaning on FPR is the issue because I well dont know what else to think. Bad injectors, Failing Fuel pump, TPS, MAF all suspects still..

Monday I am ordering a Code Reader and FPR.. unless someone comes up with something else for me to check.

**somethingclever** · 04-10-2011, 09:42 PM

you hsould be around .95-1 volt idle and 4.5-5 volts WOT.

fix the TPS

**RogerStout** · 04-10-2011, 09:47 PM

My bad it 4.65 WOT.. long day..

**Martin0660** · 04-11-2011, 12:36 AM

Originally Posted by RogerStout

Fuel pressure holding at 38 idle swings to 45 WOT then drops to 30ish and recovers to 38 back to idle..

Although you should not smell fuel on the FPR line as you did, these are likely typical readings for fuel pressure. Everything is referenced to manifold vacuum, so you have a base with vacuum (38), then the vacuum goes down with WOT so the rpessure goes up (45), then the vacuum recovers with less load (30ish), then back to idle. Again it may be leaking, but it looks to still be roughly working.

You need a code scanner sooner than later to see what the EEC thinks is wrong. Not saying that will point you to a bad component, but it will tell you what the EEC doesent like ;) Is the ECT hooked up on this thing (Engine Coolant Temperature)?

**RogerStout** · 04-11-2011, 12:53 AM

Yes it is..

**RogerStout** · 04-12-2011, 05:17 PM

Alright Code reader came today and I walked my happy ass right out there in the rain and pulled codes..

172 HEGO Ho2s Fault/Lean

176 HRGO Ho2s Fault/Always Lean

212 Loss of ignition diagnostic monitor signal/Spout circuit grounded

OK so I recently set the timing that required me to pull the spout connector so I can for the most part dismiss 212.

172 This is interesting because when I got the car it was running really rich in the left bank but the O2 now reports a lean condition. (may have been why the Fuel Pressure was turn up to 50psi when I got the car) Now at 39 psi

176 appears to be more of the same just stating that the car is running ALWAYS lean on the left bank. The self Test reported nothing these codes were in system memory. The car sat for weeks with no battery so I assume any codes prior to my owning the car were long gone but I might clear the codes and see what is generated from its current setup.

The bad regulator theory becomes even more relevant as it only seems logical that the left bank would be the first suffer from a bad FPR. Vac leak but I cant find one.

You think I am on the right track?