Have a 95 with a series II engine ... will the 73 inch measurement work also, or does the series II have a different belt path?

Replaced the fuel pump this past weekend and this seemed to resolve the hard start problem, and as a bonus the engine def. has more power; will pull right up to red line at WOT before shifting, before I think it would pull to about 5500 (maybe less).

However, now it idles rough on occasion, and the ...

Don't like doing things twice .... especially dropping the gas tank. Have a naturally aspirated 3.8 Type II in a 95 SE. Have weak pressure (yes, changed the filter). Is AC Delco the OEM spec? They are about $120 from the local parts store. Any other brand that is recommended?

Yup - replaced the fuel filter two weeks ago.

Took it to a local indy mechanic. Said it was an O2 sensor and the fuel pump (pressure was reading low...which I knew; about 34 psi) to the tune of $860. O2 sensor made sense.. I could see heat sink issues effecting this. Fuel pump didn't; why would it pump fine 15 min after shut - off, then not ...

Went out with the fam' to Trader Joe's, came back out and it wouldn't start. :( So went and had a beer at a local pizza parlor and chilled for 30 minutes. :)

When I cleaned the sensors, they were all very clean - don't think that is the source of the problem.

Agree with the comments about oil ...

Just did an oil change, and put a qt of Lucas oil in it. now runs ~ 45 psi at speed fully warmed up, ~ 35-38 psi at idle.

That was one of my original thoughts....low oil pressure, so the ICM wasn't getting the signal to fire. As I've read, it has to detect oil pressure while cranking for it to ...

Okay - It's better now that the coolant temp sensor has been replaced, it will start, however, it still will idle rough ... it will chug...kind of like a sine wave for about a minute before it clears it throat. It acts like it is rich (although I did replace the FPR) I'm wondering if i have a leaky ...

The saga continues... but have my fingers crossed for a happy ending.

Two weekends ago I checked the fuel pressure at the rail and it was reading 34 psi...not bad, but below the 40 psi that i've read it should have. Just purchased the car in August, and not knowing when the fuel filter was ...

Thanks for the additional feedback ... will check.

I have one other theory that I really hope isn't true...that the compression rings are worn, and that when it gets hot, there isn't enough compression to fire....you need three things for an engine to run: spark, gas, and compression. The reason I ...

Still having issues....

This is an updated list of what i have done so far:

- swapped coil packs
- replaced FPR
- replaced UIM and LIM gaskets as well as UIM itself.
- cleaned the trio of sensors at the throttle body.
- Replaced IAC
- replaced plugs
- Replaced crankshaft sensor
- swapped the ...

yes i did, there are two sensors, one for the guage reading and the other is for the computer to adjust fuel. The one im refering to is kind of just below the throttle body IIRC. And other than having starting problems it ran great.

There's two? The one that gave me the bad temp gauge reading is ...

^^ I will try this. Interesting you mentioned it....when I did the manifold gaskets I bought a new one to replace as a PM measure (I also did the T-stat, as it appeared to be sticking based on T-gauge readings). The new one was DOA - As soon as I turned on the car it immediately pegged the meter at ...

sandrock wrote:3) I converted Dons '95 Bonneville to run OBDII so he could be rid of the troublesome 94/95 PCM that had already gone through 4 computers and none of them were really worth a *dang* to start with.

Is there a write up on this? What years/makes/models could i use as a donor for parts?

I guess I got my hopes up too much. Any suggestions as far as diagnosis, would be appreciated. recap of the symptoms:

- hard start warm, most prominent if i wait 15-20 minutes...sometimes won't start at all and have to let it cool down for another 20 minutes.
- pushing the pedal all the way to the ...

It has the OBD II scanner connector, but I've tried 4 or 5 different scanners, and all i get is a link error. As OBD II started in 1996 do i need a 'special' scanner or software to read, or is there an issue with my connector/link that I need to troubleshoot?

No codes now :) but it does make ...

I know this is kinda an old thread...but it took me this long to figure it out. Took it to my local indy, and said it needed an UIM and LIM gaskets. Decided to do it myself with the help of this forum and youtube. It definitely needed both, UIM was melted @ the egr tube and oil was leaking all in ...

^^^^ You were right. I pulled the TPS out and recleaned it. I suspect I had the little tang in front of the "T" instead of behind it when I first installed after cleaning yesterday. Thanks!

Replaced the IAC yesterday on my 1995 Bonnie (SE w/ series II). Also cleaned MAF and TPS with electrical cleaner. Think I FINALLY fixed a nagging warm hard start problem. As soon as I started it up the CES light came on. Also noticed that the shift points on the transmission are now a lot higher ...

Have an intermittent hard start problem when it's warm; most noticeable when running errands and making 3 or 4 stops. Car will fire, but will take several times before it will finally catch... it will "chug" for 15-20 seconds before the idle will rev up to 1300-1500 rpm and then it will settle down ...