espey_16 Posted September 27, 2015 Share Posted September 27, 2015 Hey guys, last weekend I bought an 89 gl 5 speed d/r. The check engine light was on when it, and when it was cold it didn't want to idle. Warmed up it ran fine. This weekend I put an air filter, fuel filter, plugs, wires, cap, rotor, pcv valve in it and changed the oil. I filled the tank and put a can of seafoam in it too. I drove it to my dad's house yesterday and on the way home it started to studder while driving. Today it is idling really rough, and when I tap the gas it dies. I checked the dtc's and I'm getting a core 34, 35, and 51. I'm not sure, but would any of those cause the car to idle rough like that? Link to comment Share on other sites More sharing options...
DaveT Posted September 27, 2015 Share Posted September 27, 2015 Here is how to fix 34 and 35 permanently: http://home.comcast.net/~davidtief/solenoid.html But those won't effect idle / running noticeably. 51 is the neutral switch always on error. I've never had that one. 2 Link to comment Share on other sites More sharing options...
espey_16 Posted October 10, 2015 Author Share Posted October 10, 2015 Ok, I'm gonna try this out this weekend. Thank you. Link to comment Share on other sites More sharing options...
scoobiedubie Posted October 12, 2015 Share Posted October 12, 2015 A vacuum leak will cause a rough idle. There are a couple of dohickeys on top of the engine that are connected to the vacuum system. The nipples on those dohickeys can break off real easy and make for a vacuum leak. A bad vacuum pump will cause a rough idle. An oil dip stick that is not all the way down will cause a rough idle. A disconnected vent hose to the cam tower cover will cause a rough idle. If you look at the engine sideways, that will cause a rough idle. 1 Link to comment Share on other sites More sharing options...
espey_16 Posted December 5, 2015 Author Share Posted December 5, 2015 I took the car for a drive the other day, and it started cutting out while driving, and dieing when I stop. I have to pump the gas pedal to keep it running. Im not sure what's going on. Link to comment Share on other sites More sharing options...
espey_16 Posted December 9, 2015 Author Share Posted December 9, 2015 Bump Link to comment Share on other sites More sharing options...
espey_16 Posted December 26, 2015 Author Share Posted December 26, 2015 I think I figured it out. The cat might be clogged. I banged on it a few times and now the car will idle. I'm about to take it for a quick drive and I'll report my findings. Link to comment Share on other sites More sharing options...
espey_16 Posted December 26, 2015 Author Share Posted December 26, 2015 The car is running well, still a little hesitation around 2500-3500 rpms. But it's an improvement for sure. I just need to go to an exhaust shop now, then I can really get it dialed in. 1 Link to comment Share on other sites More sharing options...
DaveT Posted December 26, 2015 Share Posted December 26, 2015 You can test for a blocked exhaust by loosening the 4 y pipe to head nuts. Get about 1/2" of clearance, see how it runs. It will be loud. But if it runs good, then you know the exhaust is plugged. Another way to check is to connect a vacuum cleaner to the tail pipe end. Do tye same with the 4 bolts, get space for air to get in. Canister or shop vac style. The vacuum cleaner motor should barely change it's tone when connected vs disconnected from the tail pipe. 1 Link to comment Share on other sites More sharing options...
espey_16 Posted December 26, 2015 Author Share Posted December 26, 2015 Sweet thanks. The car would only run while I was pumping the gas, then it would bog down if I gave it too much. I pounded on the cat with a piece of pipe from up top and it started smoking, but after a short drive the smoke went away and it still idled good. I just got ack from another drive and now the car is running like poo again, wanting to die and sounds like it's missing. Link to comment Share on other sites More sharing options...
espey_16 Posted December 27, 2015 Author Share Posted December 27, 2015 Just have to be mean to it I guess till the cat gets fixed. Good thing it's not a daily driver. Link to comment Share on other sites More sharing options...
espey_16 Posted December 10, 2016 Author Share Posted December 10, 2016 (edited) Hey guys I'm back. Same car, same issues. I thought the problem was clogged cats, but I opened them both up and they've already been gutted. When I step on the gas, the car studders unless I'm accelerating hard, doesn't matter how fast or what gear I'm in. If I try to keep a constant speed the car studders too. I'm completely stumped on this thing. Edited December 10, 2016 by espey_16 Link to comment Share on other sites More sharing options...
MR_Loyale Posted December 10, 2016 Share Posted December 10, 2016 (edited) Fuel filter? Check gas tank for debris. Injector? Edited December 10, 2016 by MR_Loyale Link to comment Share on other sites More sharing options...
espey_16 Posted December 11, 2016 Author Share Posted December 11, 2016 I replaced the fuel filter when I got the car, and haven't put more than 4k miles on it. It's due for its 2nd oil change since I've had it. I'm not sure about stuff in the tank, I'll have to wait on that I just filled her up yesterday. How do I check the injector to make sure it's functioning properly? Link to comment Share on other sites More sharing options...
espey_16 Posted December 16, 2016 Author Share Posted December 16, 2016 Anything else I should check? Link to comment Share on other sites More sharing options...
DaveT Posted December 16, 2016 Share Posted December 16, 2016 Check fuel pressure and delivery. Injector check: Once warmed up, shutdown. Disconnect the MAF. Remove the intake boot from the throttle body. Start engine. Look down throat to see fuel spray evenly on throttle plate. Open the throttle, see flow increase. Note, this will cause CEL and a code. Link to comment Share on other sites More sharing options...
espey_16 Posted April 6, 2017 Author Share Posted April 6, 2017 Hey what's up guys? I'm sorry I havent been able to post on the car, I just haven't had the time to mess with it with the baby on the way. I did some searching and found some posts where people have had similar symptoms and it turned out to be the 2 wire cts. So I went ahead and bought one, and I just installed it. All is well so far, temp is about a third of the way up on the gauge and it doesn't try to die when I give it any gas. I'm gonna let it idle for a little while longer and take it for a drive and let you guys know if that solved my problem. Link to comment Share on other sites More sharing options...
espey_16 Posted April 6, 2017 Author Share Posted April 6, 2017 So she still has a little hesitation around 3k, but she's drivable now. Link to comment Share on other sites More sharing options...
DaveT Posted April 6, 2017 Share Posted April 6, 2017 Cts can cause drivability issues without triggering a code. It has no effect on the gauge, that's run by a 1 wire sensor. Link to comment Share on other sites More sharing options...
espey_16 Posted April 6, 2017 Author Share Posted April 6, 2017 (edited) Yeah, but before I put the new cts on it would run ok when cold and run like a third when warm. Edited April 6, 2017 by espey_16 Link to comment Share on other sites More sharing options...
DaveT Posted April 6, 2017 Share Posted April 6, 2017 Exactly what happens when the sensor partially fails in a way that tells the engine it is cold all the time. Engines don't run well with the mixure balanced for a cold engine when warm. Or the reverse. Link to comment Share on other sites More sharing options...
espey_16 Posted April 8, 2017 Author Share Posted April 8, 2017 I checked the injector just now, I couldn't really see any spray but I did see fuel hitting the plate obviously. When I opened it up the car hesitated like it's been doing. I can't get it to do that when I'm not driving. Should I get a new injector then? Link to comment Share on other sites More sharing options...
espey_16 Posted April 8, 2017 Author Share Posted April 8, 2017 (edited) When I say spray, I picture a cone shape spray of fuel. I'll try replacing the fuel filter again and see if that has any effect, but there's been only a few thousand miles put on the car since I've had it and I've already replaced the filter once. Edited April 8, 2017 by espey_16 Link to comment Share on other sites More sharing options...
Dee2 Posted April 8, 2017 Share Posted April 8, 2017 Run a vacuum test on the engine for some diagnostic information. You might learn a lot. Link to comment Share on other sites More sharing options...
DaveT Posted April 8, 2017 Share Posted April 8, 2017 I can't see the spray when looking, the angles don't allow it. I did see fuel hitting the plate, and traveling outward to the edges. Things need to be tested checked measured, not just replaced. That method costs more than a meter and a vacuum gauge. Link to comment Share on other sites More sharing options...
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