My Issues

[gonen2]

I have recently change Spark plugs, wires, cap, rotor, fuel filter, PCV and Air filter. The car in not idling that good also the car doesn't alway start right up sometimes it will take 3-4 time of starting it. Battery connections a clean and Battery is new Properly ground. When the car is running there is no problems other than the idle. I have a CEL, but that because I don't have a EGR. No problem when I rev it just gets a little bouncy from 600 to 1200. I have cleaned the IAC. I also need to know is there another way to check CEL codes I cant find my DIagnostic port. I check near the battery and under the dash already any other idea where it may be. What if I dont have one can I get one hooked up?

Also when I disconnect my VAF the car just dies is that suppose to happen?

[defiler]

Is 95 still OBD1?

[gonen2]

yes it is still OBD1

[TyBrones87]

Possibly a tps issue. The car will die for most when the vaf is disconnected. Your car has no diag. port? Thats really strange. I have no other idea how you could pull codes, but you really need to figure that out, the problem might show up as a cel.

[gonen2]

I forgot to mention that I have a small exhaust leak

[GTcruiser33]

yeah i agree with Ty, sounds like TPS or idle adjustment screw.

[gonen2]

That will cause hard starting?

[GTcruiser33]

ehh dont know about the hard starting but thats most likely your idle issue, hard starting is most likely a seperate problem

[moz_21]

Crank position sensor. Mine sometimes won't start no matter how much I crank it, but I jiggle the wire and it fires right up. I do however get the code for it after the non-starting occurs. :shrug:

[gonen2]

I kind of thought it was that, but I wasn't really sure. The guy I bought the car from replace the engine and he didn't do the best job has far as tunking the wire away. That connection for the cps was rubbing against the pulley system. I hung it out of harms way. I will just replace it this week end or so. Will the Crank sensor cause bad gas milage?

[GTcruiser33]

not sure if the CPS will cause bad milage, but a high idle would.

[defiler]

not sure if the CPS will cause bad milage, but a high idle would.
TPS would too. Mine woul djump out of nowhere and sit at around 5k while at 60mph when my TPS was bad... 15mpg? No thnx

[gonen2]

I finally found the diagnostic port. It was under the battery the pervious owner messed up the wiring under the hood. I checked my code and it doesn't say anything about my CPS or EGR. I have error codes for both my VRIS and #17 (Oxygen sensor i think) Will any of this cause a hard start?

[GTcruiser33]

mmmm not sure about hard start, I think a bad 02 might cause the shitty mileage though.

[TyBrones87]

A bad o2 will cause bad gas milage for sure. Get that changed

[jay]

I had bad gas mileage for a long time til I replaced my O2 sensor and I was running around 15 mpg and now after installing i got 26 mpg at least. I could drive for 3 hours and use 1/4 tank with replaced new O2 sensors, before it was 3 hours 1/2 tank

[gonen2]

A bad o2 will cause bad gas milage for sure. Get that changed
I heard that a exhaust leak will throw the code has well. Is that true?

[TyBrones87]

I dont know about that. Only if it was before the o2 sensors and was a colossal leak. Pretty much the only place for it to happen is right where the manifold meets the head

[James'89GT]

Ok well first off an exhaust leak can throw an o2 code for being lean on that o2 sensor then the ECU will richen the air2fuel so that the motor will run right. A bad o2 sensor will make it run bad and also getting bad gas mileage and it is POSSIBLE for it to hard start but usuallly not likely for just the o2 sensor. First off I would say fix your exhaust leak then if it is still there I would think about replacing the o2's. Most of this is maintance so its beneficial to your motor life. That is just my thoughts

[gonen2]

Hope this makes sense but It doesnt have trouble starting in the morning or after 4 hrs of sitting but if I drive it hard for 20min then shut it off for 20min than try to start it gives me trouble usually take a couple attemps. If I drive it hard 20mins shut in off for 2min and it will start right up no problems wierd.

[James'89GT]

What it sounds like is a horribly bad diaphram in the fuel pressure regulator. If you take the vac line off the fuel pressure regulator and smell gas then its bad. I would definately change this now because it sounds like that diaphram is so bad now it can't even hold pressure for 20 mins when its suppose to hold pressure until the next time you start your engine up again which means soon it will start to stall or not even hold any pressure and not start for you the next time you want it to even after sitting 2 minutes. I would change this now along with that manifold gasket

[gonen2]

What a Diaphram?

[gonen2]

What it sounds like is a horribly bad diaphram in the fuel pressure regulator. If you take the vac line off the fuel pressure regulator and smell gas then its bad. I would definately change this now because it sounds like that diaphram is so bad now it can't even hold pressure for 20 mins when its suppose to hold pressure until the next time you start your engine up again which means soon it will start to stall or not even hold any pressure and not start for you the next time you want it to even after sitting 2 minutes. I would change this now along with that manifold gasket
What the hell is a Diaphram and where is it located? I ask around and nobody knows what I'm talking about.

[moz_21]

Right on top near the VAF meter. It's on the fuel rail, has a vaccum line coming out of it and hooks to a VRIS solenoid.

[gonen2]

Can you give me a Pic. Or its technical name. I looked in the manual and didn't find anything.

[moz_21]

I'll take one in the morning for you.

[gonen2]

thanks man

[moz_21]

http://s87794874.onlinehome.us/images/fpr_and_solenoid.jpg

Here you go. The thing in my hand is the solenoid that activates the FPR, the round thing with the hose attached on the front fuel rail.

[gonen2]

I found that this morning before u posted it, Yea its reference in the book has a solenoid. I smelled the all hoses coming out of it and I didn't smell any gas. any other ideas on what gives me a hard start? Thanks for the pic Moz21

[James'89GT]

Can you give me a Pic. Or its technical name. I looked in the manual and didn't find anything.

The diaphram is in the fuel pressure regulator and over time it will get weak.

Any other ideas on what gives me a hard start?


If any of those hoses didn't smell like gas then your problem could be a bad fuel pump because when the bearing gets worn it creates more friction in the pump and causes it to get hot and turn off or really noisy. But without me seeing it I really don't know if it is a fuel pump or a bad fuel pressure regulator or if there is something else wrong.

[gonen2]

Now the car wont start I check the codes and all I get is #16 and both my VRIS. I know before I was getting 17 now its gone (I didnt miss count because I checked myself like 20 times to make sure) When I GRD to F/P the car starts (I'm also low on gas) before I did all this I made an idot mistake and jumped ign- to F/P would that have destroyed anything. I also did the fan method for adjusting the TPS.

The only time I hear the F/P is When I GRD to F/P is that suppose to happen? I've read thread that it only starts when the car is being started is that true?

[TyBrones87]

Yeah, the f/p only fires up when the key is turned to start for a few seconds. Some fuel pumps are naturally quiet so I don't know if thats the best method to check it out. I doubt that you hurt anything by jumpering f/p and ign-.

Another thing is to fill up the gas tank obviously. If the car is parked on a slight slant its going to make the to gas move to one side of the tank, and away from the fuel pump.

[gonen2]

car only starts when I Gnd to F/P its my fuel pump bad or should I Change my Fuel Pressure regulator.