david roush

iTrader: (1)

Thought i had a problem with the starter doing the click thing w/ no start half of the time so i finally bought a vats ket , the car starts on the first try 90% of the time instead of 20% of the time not to mention sometimes the car will start up and stall out like three times before it will stay running , like its getting enough fuel to start up but then not enough to keep running i am almost sure it has something to do wuth the chip not allowing the injectors to feed the car the fuel.......Who burns the best chips ??? No one in my area knows jack about these cars and so far after $400.00 i am still looking to find a good chip...any suggestions?

1992rs/ss

moates.net, just buy the stuff to burn, a g1 adaptor, and some blanks. then go to town.

david roush

iTrader: (1)

I want to fix the car, not f#$% it up.

89gta383

iTrader: (5)

Sounds like you have some other problem, not the chip, you will have to go over all of the basics to diagnose it.

david roush

iTrader: (1)

after diagnosing it 90% sure it's the chip.

John Millican

iTrader: (1)

Maybe the chip is telling the injectors to pulse except the injectors aren't listening (meaning they are not spraying properly). There are many things that cause rough running, stalling and hard starting, GM didn't design the chip with any of those problems. Chips don't just go bad either unless you exposed it to sunlight.

Suppose I burned you a chip and the car had the same problems. Would you complain that my chip must be bad?

406TPI

iTrader: (1)

Your problem is not the chip! Start diagnosing systems until you find the culprit.

david roush

iTrader: (1)

okay then...where do i start to diagnose the problem then?

pwdbychevy

First you need to buy a manual for your car preferably Chiltons. Second, pull the trouble codes if your SES light came on and refer back to the manual for troubleshooting procedures for that specific trouble code. I found it kinda funny that you live in Mechanicsburg and no one knows about cars over there

david roush

iTrader: (1)

Okay....no codes...new injectors, new tps, new msd6a ignition box, brand new optima gel battery, new starter , new battery cables.........no one in the area around here knows anything about burning chips or anything regaurdless about 3rd gens, called two speed shops ...no help...they all know stuff about mustangs, one kid they did refer me to didn't have the stuff to burn a chip for the 7165 ECM,again ...no help

mjustdie

did you adjust your tps correctly? how about check your fuel filter? had that same problem already, couple of bux fixed it up. could even be your fuel pump going bad. did you replace the injectors with the same sized injectors? just some ideas to help, good luck.

david roush

iTrader: (1)

Thanks for trying to help.....injectors are acell 23 lbsW/ Holley AFPR.......fuel pump is an AC Delco just put in about a year ago when i did the swap....TPS is set at .56 V and 4.8 V - WOT.

anesthes

iTrader: (12)

Yes they do. Memcals go funky all the time. Do random weird things, misread, go into limp, etc.

Reading this, sounds like he checked most everything. There is a few remaining things to check, but I'd try a new memcal now. Or an ECM.

Funny, this sounds much like a Tojan my cousin was working on a few months ago (at an engine shop). Customer came in with the car, said the engine was dead. The shop told the customer the engine was fine, it was the management system. Customer demanded a new engine, shop said "fine your paying for it".

Replaced engine, car still ran rough, idled weird, stalled sometimes.

Mechanics checked everything. Then the called me up. Went down with my memcal adapter and a fresh burned stock chip. Verrified it cured the problem, and had them order a new memcal from GM.

Out the door and a happy customer.

-- Joe

-- Joe

mjustdie

sounds like you will need a new "custom" chip. the last time i checked the 350 tpi's ran 21 lb injectors not 23. your dumping more fuel than stock and the ecm thinks its still the same. and accel, well if you look around you will not hear to many good things about accel injectors. what is your fuel pressure set at? turning it up may help a little, but not much.

david roush

iTrader: (1)

Do you mean at idle speed? If so here's the funny thing one time i'll look at it and it'll be at 40 then maybe the next time 45, seems to fluxuate...is this normal??

mjustdie

the pressure does alter itself just not at a standing point. your idle and wot settings will be different. did you disconnect your vac line before you set it? it could have something to do with the larger injectors, which would still mean you need a custom chip.

doc

An intermittent problem is very very fustrating and very difficult to diagnos (sp).

Also, Memcals going bad is a remote occurance, I doubt very much its the chip.

I have read several scary stories about Accel fuel injectors, these things could be your problem,,, but how to prove it?

What is your fuel pressure? It would be good to hook up a fuel pressure gauge and tape it the the window wiper so that you can see it from the drivers seat.

I would start with the basics,
1) remove & clean the IAC valve,,,
2) remove and check (clean) regap spark plugs,
3) set the static timing to 8* (be sure to disconnect the EST wire when doing this),,,
4) complete the minimum air routine, but set the idle RPM at 650, not the 450 as called for in the procedure,,
5) then reset the TPS voltage at 0.60 to 0.64...

Take care of these basics to start with,,, it will cost you time only
provided that you have the right equipment and tools.

JPrevost

Yeah, does the SES light turn on with key on and then go off with engine start? I'm assuming it does since you said no codes, and if you were able to check for codes then you'd have to have a properly working ecm. So if the ecm is working properly then it would also tell you if the memcal was bad. 2 things happen when a memcal is "bad", it'll through a code 52 and blink the SES VERY fast. Strobe light fast and run in backup mode. In the daylight it's sometimes hard to see the SES flickering very fast so look closely.
Sorry I can't help you further but I think we've determined that your ecm and memcal are working properly.

Zepher

iTrader: (1)

I would swap out the ECM and memcal liek mentioned before. do the ECM first and if it still has problems put the old ecm back in and get a new memcal.

Also, check all your grounds and power wires.

I am not sure if the problem I had with my stock chip is common, but my stock chip wouldn't turn on my fans. I happened to burn myself a chip when I converted to a manual tranny and the fans started to work.