QuestionI have a 94 hyundia elantra 1.8 and it idles really rough especially under a load..but accelerates good and runs great at hi rpms around 2500 and below is rough if im at a stop light foot on brake and in drive it really starts hard sputs sput sput louder an louder and more violent motor starts bounce so i usually put in nuetral....
It didnt pass emissions..ihave good spark.. the#1 plug was a little foul not bad..ive sprayed break cleaner in the throttle body and it doesnt want to idle at around 700- 800 rpms ..i think i have a bad vacume leak or im wondering about the timing can it be adjusted?.. or ckd?.. ..I alighned all the timing marks and they seemed to be closeas far as i could tell would acouple degrees make the idle react that badly?.... and i'm also hear like raddling noises coming from around the timing belt cover area on acceleration and when im accelerating in to a corner..like when your stopped and you make a right or left turn..but steering is smooth......But one right front strut is bad...and the tranny..doesnt grab very qiuckly in drive sometimes its not really a slip kinda like its not in gear its either goes or not when it grabs it grabs fluid level is fine
just kinda wondering if these car were prone to some of these problems
gonna try and figure out how to do a pressure test on the intake tommorrow
and i do have a chiltons
any info will help
thank you
gary
AnswerIn regard to your running rough, it sounds like you have a misfire. Based on your description, I'd suspect an engine problem, but it's good to do some tests. Run a compression test on all four cylinders. This will show an engine problem in most cases. It's also good to check the plugs, wires, coil, and injectors. If you can determine which cylinder is misfiring, you can check the plugs and injectors by swapping with another cylinder and then rechecking which cylinder is misfiring.
The timing is adjustable, but misadjusted ignition timing shouldn't cause the symptoms you describe. If you'd like to check it, you'll need to ground the timing adjustment connector-- I believe it's taped to the harness on the firewall and labeled something like "ECT Adjust." Then you'll need to adjust the base idle screw (under the rubber plug in the top of the throttle body) until the engine is at the proper rpm. If you're using an inductive pickup to determine rpm, you'll need to divide the displayed value by two because your ignition system fires the plug twice per camshaft revolution. Once you have the idle set, then check the timing. Specification is 5 degrees btdc. If you need to adjust the timing, loosen the two screws holding the optical sensor on the transmission end of the valve cover and turn it like you would a distributor.
Rattling noises from inside the timing cover are typically the result of an undertensioned timing belt. Usually, this is caused by a defective hydraulic tensioner, but can also be caused by a misadjusted tensioner pulley.
In my personal opinion, the 1992-1995 Elantras were some of the lowest quality cars ever made. They have transmission, brake, suspension, and timing belt problems. It sounds like your car may already be in significant disrepair, so you should be very thoughtful about how much money you spend on repair. At a certain point, and you need to decide this point for yourself, the car is no longer worth the expense of repairing.
To complement your Chilton manual, you can also register for a free account at www.hmaservice.com. You'll be able to see the factory manual there.
