2.8 stalls under load?

[pocket-rocket]

Freescan (can be buggy):

http://www.andywhittaker.com/ECU/FreeScan/tabid/70/Default.aspx

Tunerpro RT (free, but has a 10 second nag screen if you don't donate)

http://www.tunerpro.net/

OBD2 stuff (I haven't tried any of it):

http://www.obdpros.com/obd_software.php#free_software

http://www.obdallinone.com/sc/pages.asp?pageid=60

For the OBD2 stuff you will need one of those ELM357? base scan interfaces if you want to use a laptop. I got mine on ebay for around $20 shipped from Hong Kong I believe (took about 2 weeks to get here).

[robertisaar]

i just recently made the ADS necessary to read those cars for tunerpro. that would work out fine for you.

recall: post the car's BCC (four letter code on the sticker of the PROM inside the ECU) and i'll look it up to see if it got the work done.

[bimdub]

Bimdub... I agree with your analysis so far.

Will the engine restart immediately after it dies? If not, does it still have spark? How long will the engine run if you don't rev it?

You could connect a scanner to monitor RPMs, injector pulse width and voltage at the ECM as the engine dies. A better alternative would be to use an ALDL cable and free software on a laptop to record the data while the ECM is on. You can even make your own ALDL cable.

the car will restart most of the time, sometimes I have to try several times to get it to start, the noid also flashes dimmer when it it struggling to start.

as for ALDL....I am unsure as this is an 88 and there is only two pins in the connector. yeah free software....where? is this software available for OBD2 Vehicles as well? come on....hook me up! I have built my own megasquirt ECM for another car so fabricating my own cables it not that big of a deal to me.

heres a question: did the car ever get the recall work done to disable the MAF?

I have no friggen idea, I searched and could not find any indication on the car, the MAF is brand new though as well as the MAP. the car will run exactly the same without the MAF connected.

[robertisaar]

heres a question: did the car ever get the recall work done to disable the MAF?

[CNCguy]

Bimdub... I agree with your analysis so far.

Will the engine restart immediately after it dies? If not, does it still have spark? How long will the engine run if you don't rev it?

You could connect a scanner to monitor RPMs, injector pulse width and voltage at the ECM as the engine dies. A better alternative would be to use an ALDL cable and free software on a laptop to record the data while the ECM is on. You can even make your own ALDL cable.

[bimdub]

ok...bought the noid lights....connected the little bugger to the number one injector...fired the engine up....let it warm up.....raised the rpms with the fule pressure gauge still connected as well as the timing light (for spark verification) my timing light is triggerless so it remains on.

as I raised the rpms the flashes from the timing light get faster.....the flashes from the noid get brighter and faster, the fuel pressure remains at a solid 40 psi, then at about 2500 rpms the noid stops flashing, the timing light continues to flash as the engine winds down and the fuel pressure stays at 45 psi.

something is apparently cutting the injectors off at this point, even if you let off the throttle it still dies so. so I guess I need to check the ECM and see if its getting the signal from the ICM at this point?

[robertisaar]

sounds expensive

*cough* WAS *cough* expensive...













.....for someone.

[bimdub]

sounds expensive

[robertisaar]

i haz the alldata for 82-02 GM cars...

and some foreign stuff too...

[bimdub]

i can help somewhat with the service manual parts....

do you have them in PDF?

I got a PDF one for my Honda S2000......great tool!

[60dgrzbelow0]

ok maybe I need to give more information, the car has a much newer engine (re manufactured a couple years ago) and new plugs and wires, this is a friends car that has been maintained immaculately until it was parked a year ago...

If the car sat a year... without so much as one turn-over, then the gasoline sitting dormant in the tank definitely went stale and sour as well as in the fuel lines and especially...whatever residual fuel was left in the EFIs that could clog up the super-fine screens on the inlet side or bake on in the hot engine after shutdown so as to gunk up the tiny "spinerette"-like nozzles in them.

When you first cranked it up...did you notice whether or not there was an overwhelming "stale gas" smell around the vehicle?. If so...the very best "In the Tank" fuel system cleaner is... hands down...Chevron "Techron"... a few treatments with some small bottles of this stuff in several tanks of gas might just do the trick ...and wake up any "Sleepy" EFIs...

[60dgrzbelow0]

ok noids have been purchased, I used to be a diagnostic technician, but have moved on and no longer have access to all the "tools of the trade" I really miss the four gas and scope I used to use daily, as well as the service manuals.

It won't take long now for you to nail down the problem and put that car to rights again. There are some very talented, capable and interesting members here in this cool place that collectively...must have ten thousand man-years of experience with all the versions of the 60* and 90* power plants...and most of them will do everything they can to help everyone else out when the odd thing stumps the best of us...

--== Welcome to www.60degreev6.com ==--

[robertisaar]

i can help somewhat with the service manual parts....

[bimdub]

ok noids have been purchased, I used to be a diagnostic technician, but have moved on and no longer have access to all the "tools of the trade" I really miss the four gas and scope I used to use daily, as well as the service manuals.

[bimdub]

yeah I have been looking for a set of these, I almost made my own to verify the lack of injection pulse. I still suspect something is amiss with the ICM and its not sending the signal to the ECM. personally, the car is in really good shape and its well worth saving, I may not own a 60 degree GM six at this time but have in the past and they have always served very well....you guys are very helpful.