Artemis Posted August 25, 2011 Report Share Posted August 25, 2011 Okay, I'm going to try to explain everything that has been done to this car and where we sit now. 95 GTP, engine threw a bearing. Lucky for me I had a spare 96 LQ1 with harness, ECM, etc. Me and my buddy built it up from the ground. All new gaskets, new CPS, TPS, plugs, wires, timing belt, tensioners. We installed the engine into the car, and got it to start. It wouldn't really run without a little throttle. After one successful run of about 20 seconds or so it wouldn't start again. Starter wouldn't even turn over. So now we wait until the following day. Try again, car starts but dies after a few seconds, car will turn over again but not start and you can smell gas. Pretty sure its flooding. Then the starter wont turn over again. We have some electric gremlin. Yesterday, try to start again. Starts first time, dies after a few seconds just like the previous day. Then we smell gas and it wont start. We decide to track down electrical gremlin because starter wont turn again. Well, alternator positive rubber boot isn't on and the metal power steering line is touching. Fix that up. Now it will turn over each time. But it struggles to start. We can get it to consistantly start with WOT, but it wont go above 1k rpms and dies after a second or two. Not sure if its not getting enough gas, or maybe that the fuel pump cuts off after car is running? Could we have fried the ECM? MAF? IAC? Not sure how to check FPR, its not spitting out gas. Quote Link to comment Share on other sites More sharing options...
thikstik Posted August 25, 2011 Report Share Posted August 25, 2011 I knew of a 94 bonny that had an intermittant connection at battery...it fried the computer. His wife said that when she tried starting itd only run a few seconds and that the gauges were flickering. Shop said He lost inj pulses. It was a fried ECM. The pos cable on starter sounds like it may have sent dirty powerin your case. Need to check fuel pressure. Quote Link to comment Share on other sites More sharing options...
Captain Ficho Posted August 26, 2011 Report Share Posted August 26, 2011 My buddy thinks its the ECM but I have my doubts. We are able to read it with an OBD2 scanner. Its really acting odd though. Earlier today it was starting for a few seconds but not flooding. But now its flooding again and nothing has changed really. Scanner is telling us something however that may be a clue. -39F coming from the coolant temp sensor. Its definitely plugged in, and both the 1 lead sensor on the head under the crossover and the 2 lead sensor in the LIM are brand new and plugged in. Other readings from the OBD2 scanner. MAP 29.8 Calc LOAD(%) Have seen 3.1 and 0 MAF - 0.250lb/min I assume the MAP is reading normal. These readings are when the car is set to ON, not running. If I unplug MAP is goes to 0. IAT reads good temps. Would you still be able to read live data if the ECM was toast? Quote Link to comment Share on other sites More sharing options...
Artemis Posted August 26, 2011 Author Report Share Posted August 26, 2011 Sorry, that was me writing on Fil's PC, forgot to log him out. Just in case people were confused. Quote Link to comment Share on other sites More sharing options...
AL Posted August 26, 2011 Report Share Posted August 26, 2011 Replace the coolant sensor, its making it flood the engine with fuel Quote Link to comment Share on other sites More sharing options...
thikstik Posted August 26, 2011 Report Share Posted August 26, 2011 Its very possible to scan a bad ecm. Just 1 bad transister , among hundreds of other discreet components inside the ecm that couldve gone bad, and ..... Quote Link to comment Share on other sites More sharing options...
BXX Posted August 26, 2011 Report Share Posted August 26, 2011 The car will not start or even really run with the PCM seeing a coolant temp of -39F. That issue needs fixed first. Quote Link to comment Share on other sites More sharing options...
Artemis Posted August 26, 2011 Author Report Share Posted August 26, 2011 Replace the coolant sensor, its making it flood the engine with fuel I think its more likely the wiring than the sensor itself. Sensor is brand new. Anyone have a full pinout for 96 harness? Quote Link to comment Share on other sites More sharing options...
Artemis Posted August 26, 2011 Author Report Share Posted August 26, 2011 On another note, I have unplugged harnesses that I have no idea what to do with. This one, below the rad cap. Second view of one under rad cap. Just below power steering, coming off the main line going to C100. Quote Link to comment Share on other sites More sharing options...
AL Posted August 27, 2011 Report Share Posted August 27, 2011 The one below the radiator is the low coolant sensor, it plugs in right on the radiator under the cap, youll see it if you look closer... And the one next to the power steering Im not sure about Quote Link to comment Share on other sites More sharing options...
Captain Ficho Posted August 27, 2011 Report Share Posted August 27, 2011 Update, and this is actually me... not Clayton posting with my account again hahah. So, we played with the wiring, cleaned some connectors etc; and we got the car running. We got it running enough to throw three codes, MAP sensor high input, Coolant Temp Sensor high input and Cam Sensor position A. ECU is still reading -39F for our ECT, however we did get the car to run for a good minute, idling away fine. I had the scanner on it, and the TPS was reading 100% at all times but as soon as you touch the throttle the car stalls. With the scanner on it and car not running, the TPS reads completely accurate. Why would the TPS start reading wrongly once the car is running, that makes no sense to me... Thoughts? Quote Link to comment Share on other sites More sharing options...
Galaxie500XL Posted August 28, 2011 Report Share Posted August 28, 2011 ..especially considering the LQ1 doesn't even HAVE a MAP sensor...that went away once MAF was used to meter airflow, beginning (I think) in '94. Quote Link to comment Share on other sites More sharing options...
AL Posted August 29, 2011 Report Share Posted August 29, 2011 (edited) Take a pic of your intake please, and replace your ECT, its causing most of the issues at this point... Also, everything under the hood is now 96 right? Including the OBDII conversion? Edited August 29, 2011 by AL Quote Link to comment Share on other sites More sharing options...
Artemis Posted August 29, 2011 Author Report Share Posted August 29, 2011 96 LQ1 Has a MAP and MAF. I'll take a pic when I get a chance. We replaced the ECT, even though it was brand new. Now we're getting 24F as ECT from the scanner. Its at least not completely toast, but not sure why the reading is off. The harness under the rad is not the coolant level, thats a male plug and its already plugged in. Not sure what to make of it really. After we were getting the 24F engine was still flooding. Quote Link to comment Share on other sites More sharing options...
thikstik Posted August 30, 2011 Report Share Posted August 30, 2011 My buddies 89 IROC has a tps that reads fine key on engine off, but engine on, its about half of value of setting. We never figured it out and car runs with almost no issues. I told him that the CTS is on the same leg as the TPS. Maybe your TPS will clear up once CTS is figured out. Quote Link to comment Share on other sites More sharing options...
thikstik Posted August 30, 2011 Report Share Posted August 30, 2011 Have you tried pressing/wiggling ECT connection when scanning? Maybe the female plug has loose pin inlets. Quote Link to comment Share on other sites More sharing options...
Artemis Posted August 30, 2011 Author Report Share Posted August 30, 2011 Have you tried pressing/wiggling ECT connection when scanning? Maybe the female plug has loose pin inlets. Oh, we've wiggled and jiggled! Doesnt seem to change the result. Quote Link to comment Share on other sites More sharing options...
thikstik Posted September 1, 2011 Report Share Posted September 1, 2011 I wonder if the CTS is on same wiring leg as TPS. Have you ohmed out cts? Quote Link to comment Share on other sites More sharing options...
Artemis Posted September 1, 2011 Author Report Share Posted September 1, 2011 I wonder if the CTS is on same wiring leg as TPS. Have you ohmed out cts? TPS is running on a totally different line. Quote Link to comment Share on other sites More sharing options...
Artemis Posted September 27, 2011 Author Report Share Posted September 27, 2011 Just an update, for those who feel like being depressed. Have since replaced ECM, MAF, MAP, FPR, CTS and still the car keeps flooding. Also tried swapping out ICMs. I'm going to clean her up and bring her to a mechanic that specializes in electrical issues which I believe it has to be. Quote Link to comment Share on other sites More sharing options...
Artemis Posted October 11, 2011 Author Report Share Posted October 11, 2011 This car is still flooding. I've pretty much run out of ideas. I just put in a whole other harness this weekend, and still it floods. Every sensor has been replaced except ICM. Could the ICM cause this somehow? Could I have jumped timing on my brand new belt? Quote Link to comment Share on other sites More sharing options...
thikstik Posted October 12, 2011 Report Share Posted October 12, 2011 Its gonna take a helluva good mechanic. Good luck Quote Link to comment Share on other sites More sharing options...
GEN1Z34 Posted October 12, 2011 Report Share Posted October 12, 2011 ..especially considering the LQ1 doesn't even HAVE a MAP sensor...that went away once MAF was used to meter airflow, beginning (I think) in '94. All LQ1's from 94 till production ended had Both MAP, and MAF sensors..(obd2) Prior to that OBD1 cars (93 back) only had a MAP.. Quote Link to comment Share on other sites More sharing options...
GEN1Z34 Posted October 12, 2011 Report Share Posted October 12, 2011 This car is still flooding. I've pretty much run out of ideas. I just put in a whole other harness this weekend, and still it floods. Every sensor has been replaced except ICM. Could the ICM cause this somehow? Could I have jumped timing on my brand new belt? Sure can.. If you forgot to preload the timing belt tensioner when you installed the new belt, or the cam timing was off in the first place.. How about the 02 sensors, replaced, damaged sensor or wires, disconnected? Quote Link to comment Share on other sites More sharing options...
Artemis Posted October 12, 2011 Author Report Share Posted October 12, 2011 Sure can.. If you forgot to preload the timing belt tensioner when you installed the new belt, or the cam timing was off in the first place.. How about the 02 sensors, replaced, damaged sensor or wires, disconnected? 02 Sensor is new, only have the front one. Since this is a 95 with a 96 engine, my car wasn't pre-wired with a second 02. But I'm fairly certain most OBD2 swaps don't add the second sensor. What do you mean preload the timing belt tensioner? Also, I'm excited that it could be ICM, have a buddy with a known good ICM, going to swap it out. Quote Link to comment Share on other sites More sharing options...
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